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- Pleurothallis abbreviata (Mexico - Chiapas to Bolivia) - now synonym of Specklinia abbreviata (Schltr.) Luer 2004
- Pleurothallis aberrans (Costa Rica to Ecuador) (nom. inv. - genus name not validly published) - now synonym of Aberrantia aberrans (Luer) Luer 2004)
- Pleurothallis abortiva (Colombia).
- Pleurothallis acanthodes (Ecuador, Bolivia).
- Pleurothallis acestrophylla (Ecuador).
- Pleurothallis acicularis (C. America).
- Pleurothallis acrisepala (Costa Rica to Panama).
- Pleurothallis aculeata (SE. Ecuador) - now synonym of Acianthera aculeata (Luer & Hirtz) Luer 2004
- Pleurothallis acuminatipetala (Brazil - Paraná) - now synonym of Acianthera acuminatipetala (A.Samp.) Luer 2004
- Pleurothallis acutidentata (Brazil) - now synonym of Specklinia acutidentata (Cogn.) Luer 2004
- Pleurothallis acutilabia (Colombia).
- Pleurothallis adamantinensis (Brazil - Minas Gerais).
- Pleurothallis adeleae (Ecuador).
- Pleurothallis adelphe (Ecuador - Azuay).
- Pleurothallis adenochila (Brazil - São Paulo, Rio Grande do Sul) - now synonym of Specklinia adenochila (Loefgr.) Luer 2004
- Pleurothallis adiri (S. Brazil) - now synonym of Specklinia adirii (Brade) Luer 2004
- Pleurothallis adonis (Ecuador).
- Pleurothallis adrianae (Ecuador) - now synonym of Specklinia adrianae (Luer & Sijm) Luer 2004
- Pleurothallis aechme (Ecuador).
- Pleurothallis agathophylla (W. South America to Brazil).
- Pleurothallis aggeris (SE. Ecuador to N. Peru).
- Pleurothallis alainii (Dominican Rep.) - now synonym of Antilla alainii (Dod) Luer 2004
- Pleurothallis alata (Mexico to C. America) - now synonym of Specklinia alata (A.Rich. & Galeotti) Luer 2004
- Pleurothallis albopurpurea (Brazil - Paraná).
- Pleurothallis alborosea (Brazil - Paraná).
- Pleurothallis alexandrae (Costa Rica).
- Pleurothallis alexii (Nicaragua).
- Pleurothallis aligera (Bolivia - La Paz) - now synonym of Crocodeilanthe aligera (Luer & R.Vásquez) Luer 2004
- Pleurothallis allenii (Panama).
- Pleurothallis alligatorifera (Brazil - Rio de Janeiro) -now synonym of Specklinia alligatorifera (Rchb.f.) Luer 2004
- Pleurothallis aloisii (Ecuador)- now synonym of Crocodeilanthe aloisii (Schltr.) Luer 2004
- Pleurothallis alopex (Bolivia to Paraguay).
- Pleurothallis alta (Ecuador) - now synonym of Specklinia alta (Luer) Luer 2004
- Pleurothallis altimonile (Colombia.
- Pleurothallis altoserrana (Brazil - São Paulo).
- Pleurothallis alvaroi (Colombia).
- Pleurothallis alveolata (Ecuador).
- Pleurothallis amaliae (Colombia to Ecuador) - now synonym of Unciferia amaliae (Luer & R.Escobar) Luer 2004
- Pleurothallis amaralii (Brazil) - now synonym of Specklinia amaralii (Pabst) Luer 2004
- Pleurothallis ambyx (Colombia to Ecuador).
- Pleurothallis amparoana (Costa Rica) - now synonym of Specklinia amparoana (Schltr.) Luer 2004
- Pleurothallis amphigya (Colombia).
- Pleurothallis amplectens (Ecuador)
- Pleurothallis anceps (Ecuador) - now synonym of Ancipitia anceps (Luer) Luer 2004
- Pleurothallis ancistra (S. Colombia to NW. Ecuador) - now synonym of Unciferia ancistra (Luer & Hirtz) Luer 2004
- Pleurothallis ancora (Bolivia).
- Pleurothallis anderssonii (Ecuador) - now synonym of Specklinia anderssonii (Luer) Luer 2004
- Pleurothallis andina (Bolivia).
- Pleurothallis anfracta (Colombia) - now synonym of Kraenzlinella anfracta (Luer) Luer
- Pleurothallis angulosa (Ecuador).
- Pleurothallis angusta (Costa Rica) - Specklinia angulosa (Luer & Hirtz) Luer 2004
- Pleurothallis angustifolia Wilson's Bonnet Orchid (Mexico to Trop. America).
- Pleurothallis angustilabia (W. South America to Venezuela) - now synonym of Specklinia angustilabia (Schltr.) Luer 2004
- Pleurothallis angustisepala (Mexico - Chiapas to Guatemala).
- Pleurothallis ankyloglossa (SE. Ecuador).
- Pleurothallis annectens (Panama).
- Pleurothallis antennata (S. Brazil).
- Pleurothallis antennifera (W. South America to W. Venezuela).
- Pleurothallis anthrax (S. Colombia) - now synonym of Ancipitia anthrax (Luer & R.Escobar) Luer 2004
- Pleurothallis antonensis (Mexico - Veracruz, Chiapas to Ecuador).
- Pleurothallis aondae (Venezuela.
- Pleurothallis aphthosa (W. South America to Paraguay).
- Pleurothallis apopsis (Ecuador) .
- Pleurothallis aporosis (Ecuador) .
- Pleurothallis appendiculata : Hand Bonnet Orchid (Hispaniola to Puerto Rico). - now synonym of Antilla appendiculata (Cogn.) Luer 2004
- Pleurothallis applanata (Ecuador) .
- Pleurothallis apposita (Ecuador) - now synonym of Crocodeilanthe apposita (Luer) Luer 2004
- Pleurothallis arachnopsis (Guyana).
- Pleurothallis archicolonae (Panama).
- Pleurothallis archidiaconi (Trinidad to N. South America).
- Pleurothallis archidonae (Ecuador).
- Pleurothallis archidonopsis (Ecuador).
- Pleurothallis arctata (Peru).
- Pleurothallis arcuata (SE. Venezuela to Guyana, Brazil - Rio de Janeiro) - now synonym of Specklinia arcuata (Lindl.) Luer 2004
- Pleurothallis areldii (Panama).
- Pleurothallis arenicola (N. South America to N. Brazil).
- Pleurothallis ariasii (Peru) - now synonym of Specklinia ariasii (Luer & Hirtz) Luer 2004
- Pleurothallis aristata : Forest Bonnet Orchid (Trop. America).
- Pleurothallis aristulata (Brazil - Rio de Janeiro) - now synonym of Specklinia aristulata (Lindl.) Luer 2004
- Pleurothallis armeniaca (Brazil - Rio de Janeiro).
- Pleurothallis articulata (Brazil).
- Pleurothallis aryter (Costa Rica, Peru (Huanuco)) - now synonym of Specklinia aryter (Luer) Luer 2004
- Pleurothallis asaroides (Brazil).
- Pleurothallis ascendens (S. Brazil).
- Pleurothallis ascera (Colombia).
- Pleurothallis aspasicensis (C. & S. Trop. America) - now synonym of Brenesia aspasicensis (Rchb.f.) Luer 2004
- Pleurothallis aspergillum (NW. Ecuador) - now synonym of Colombiana aspergillum (Luer & Hirtz) Luer 2004
- Pleurothallis asperilinguis Rchb.f. & Warsz. - now synonym of Specklinia asperilinguis (Rchb.f. & Warsz.) Luer 2004
- Pleurothallis asperrima (Ecuador) .
- Pleurothallis asplundii (Ecuador) .
- Pleurothallis atroglossa (Brazil) .
- Pleurothallis atrohiata (Haiti) - now synonym of Elongatia atrohiata (Dod) Luer 2004
- Pleurothallis attenuata (Peru.) - now synonym of Specklinia attenuata (Rolfe) Luer 2004
- Pleurothallis atwoodii (Costa Rica)- now synonym of Crocodeilanthe atwoodii (Luer) Luer 2004
- Pleurothallis aurantiaca (Brazil - Minas Gerais).
- Pleurothallis aurantiolateritia (Brazil to N. Argentina).
- Pleurothallis auriculata (Brazil to Bolivia) - now synonym of Specklinia auriculata (Lindl.) Luer 2004
- Pleurothallis aurita (Costa Rica).
- Pleurothallis avenacea Ames - now synonym of Specklinia avenacea (Ames) Luer 2004
- Pleurothallis aveniformis (Brazil - Paraná) - now synonym of Acianthera aveniformis (Hoehne) C.N.Gonç. & Waechter 2004
- Pleurothallis avirostris (Ecuador)- now synonym of Crocodeilanthe avirostris (Luer & Hirtz) Luer 2004
- Pleurothallis bacillaris - now synonym of Specklinia bacillaris (Pabst) Luer 2004
- Pleurothallis bahiensis (Brazil - Bahia).
- Pleurothallis bahorucensis (Dominican Rep.) - now synonym of Antilla bahorucensis (Luer) Luer 2004
- Pleurothallis balaeniceps (Panama) - now synonym of Brenesia balaeniceps (Luer & Dressler) Luer 2004
- Pleurothallis bangii (Bolivia).
- Pleurothallis barbacenensis (Brazil) - now synonym of Specklinia barbacenensis (Barb.Rodr.) Luer 2004
- Pleurothallis barbata (N. Brazil).
- Pleurothallis barbae - now synonym of Specklinia barbae (Schltr.) Luer 2004
- Pleurothallis barbosana (Brazil).
- Pleurothallis barbulata (S. Mexico to S. Trop. America) - now synonym of Specklinia barbulata (Lindl.) Luer 2004
- Pleurothallis barthelemyi (French Guiana).
- Pleurothallis batillacea (S. Colombia to N. Ecuador)- now synonym of Crocodeilanthe batillacea (Luer) Luer 2004
- Pleurothallis batracha (Ecuador).
- Pleurothallis baudoensis (Colombia).
- Pleurothallis belocardia (Colombia).
- Pleurothallis bertoniensis (Argentina) - now a synonym of Specklinia bertoniensis (Hauman) Luer 2004
- Pleurothallis bevilacquana (Venezuela).
- Pleurothallis beyrodtiana (Colombia).
- Pleurothallis bibarbellata (Brazil).
- Pleurothallis bicallosa (Ecuador) .
- Pleurothallis bicarinata (SE. Brazil)
- Pleurothallis biceps (Ecuador) - now synonym of Acianthera biceps (Luer & Hirtz) Luer 2004
- Pleurothallis bicochlearis (Colombia).
- Pleurothallis bicornis (W. South America to W. Venezuela).
- Pleurothallis bicornuta (SE. Brazil).
- Pleurothallis bicristata (SE. Brazil).
- Pleurothallis bicruris (N. Ecuador).
- Pleurothallis bidentata (Brazil - Rio de Janeiro).
- Pleurothallis bifalcis - now synonym of Unciferia bifalcis (Schltr.) Luer 2004
- Pleurothallis binotii (Brazil - Rio de Janeiro).
- Pleurothallis bipapularis (Dominican Rep.) - now a synonym of Specklinia bipapularis (Dod) Luer 2004
- Pleurothallis bissei (Cuba) - now synonym of Acianthera bissei (Luer) Luer 2004
- Pleurothallis bitumida (Costa Rica).
- Pleurothallis bivalvis (W. South America to NW. Venezuela).
- Pleurothallis blancoi (Costa Rica).
- Pleurothallis blepharoglossa (Cuba) - now synonym of Specklinia blepharoglossa (Luer) Luer 2004
- Pleurothallis blepharopetala (Ecuador).
- Pleurothallis bleyensis (Brazil - Paraná) - now synonym of Specklinia bleyensis (Pabst) Luer 2004
- Pleurothallis blumenavii (SE. & S. Brazil).
- Pleurothallis bocainensis (Brazil) .
- Pleurothallis boliviana (Bolivia).
- Pleurothallis bothros (Costa Rica).
- Pleurothallis bovilingua (Colombia).
- Pleurothallis bowmannii (Brazil) - now synonym of Specklinia bowmannii (Rchb.f.) Luer 2004
- Pleurothallis brachiata (Ecuador).
- Pleurothallis brachiloba (Brazil - São Paulo) - now synonym of Specklinia brachiloba (Hoehne) Luer
- Pleurothallis brachyglottis (Cuba).
- Pleurothallis bracteosa (Peru) .
- Pleurothallis brenneri (W. Ecuador) - now synonym of Specklinia brenneri (Luer) Luer 2004
- Pleurothallis breviflora (Mexico - Oaxaca) - now synonym of Acianthera breviflora (Lindl.) Luer 2004
- Pleurothallis brevipes (N. & W. South America) - now synonym of Specklinia bradei (H.Focke) Luer 2004
- Pleurothallis breviscapa (N. & W. South America) - now synonym of Specklinia breviscapa (C.Schweinf.) Luer 2004
- Pleurothallis brighamella (Panama).
- Pleurothallis brighamii (NC. & S. Mexico to C. America).
- Pleurothallis brittoniana (Bolivia).
- Pleurothallis brunnescens (Ecuador).
- Pleurothallis bucaramangae (Colombia) - now synonym of Crocodeilanthe bucaramangae (Luer & R.Escobar) Luer 2004
- Pleurothallis bucculenta (Ecuador).
- Pleurothallis bucranon (Ecuador) .
- Pleurothallis bulbophylloides (Bolivia) - now synonym of Specklinia bulbophylloides (Schltr.) Luer 2004
- Pleurothallis bupleurifolia (Brazil) - now synonym of Specklinia bupleurifolia (Porsch) Luer 2004
- Pleurothallis burzlaffiana (Bolivia) - now synonym of Specklinia burzlaffiana (Luer & Sijm) Luer 2004
- Pleurothallis butantanensis (Brazil - São Paulo).
- Pleurothallis butcheri (Costa Rica to Panama) - now synonym of Didactylus butcheri (L.O.Williams) Luer
- Pleurothallis cabellensis (N. South America).
- Pleurothallis cachabensis (Ecuador).
- Pleurothallis cachensis (Costa Rica).
- Pleurothallis cactantha (Panama).
- Pleurothallis caespitosa (SE. & S. Brazil).
- Pleurothallis cajamarcae (Peru).
- Pleurothallis calamifolia (Colombia).
- Pleurothallis calcarata (Brazil) - now synonym of Specklinia calcarata (Cogn.) Luer 2004
- Pleurothallis calceolaris (Colombia).
- Pleurothallis caldensis (Brazil - Minas Gerais) - now synonym of Acianthera caldensis (Hoehne & Schltr.) F. Barros 2004 or Specklinia caldensis (Hoehne & Schltr.) Luer 2004 ?
- Pleurothallis calderae (Colombia) - now synonym of Specklinia calderae (Luer) Luer 2004
- Pleurothallis callifera (S. Venezuela).
- Pleurothallis calolalax (Colombia).
- Pleurothallis calvariola (S. Colombia to N. Ecuador).
- Pleurothallis calypso (Ecuador) - now synonym of Apoda-prorepentia calypso (Luer) Luer 2004
- Pleurothallis calyptrostele (Costa Rica).
- Pleurothallis campestris (SE. Brazil) - now synonym of Specklinia campestris (Barb.Rodr.) Luer 2004
- Pleurothallis canae (Panama) - now synonym of Unciferia canae (Ames) Luer 2004
- Pleurothallis canaligera (Costa Rica to W. South America).
- Pleurothallis candida - now synonym of Specklinia candida (Luer & Hirtz) Luer 2004
- Pleurothallis caniceps (Costa Rica) - now synonym of Ancipitia caniceps (Luer) Luer 2004
- Pleurothallis canidentis (Colombia).
- Pleurothallis capanemae (Brazil - Rio de Janeiro).
- Pleurothallis caparaoensis (Brazil - Minas Gerais) - now synonym of Specklinia caparaoensis (Brade) Luer 2004
- Pleurothallis capillaris (Lesser Antilles to S. Trop. America) - now synonym of Specklinia capillaris (Lindl.) Luer 2004
- Pleurothallis capitonis (Colombia to Ecuador).
- Pleurothallis caprina (Colombia) - now synonym of Ancipitia caprina (Luer & R.Escobar) Luer 2004
- Pleurothallis cardiochila (Panama).
- Pleurothallis cardiocrepis (Peru).
- Pleurothallis cardiophylla (Ecuador).
- Pleurothallis cardiostola (W. South America to Venezuela and Paraguay).
- Pleurothallis cardiothallis (Mexico to Ecuador).
- Pleurothallis carinata (Peru) - now synonym of Acianthera carinata (C.Schweinf.) Luer 2004
- Pleurothallis carinifera (Brazil - Rio de Janeiro) - now synonym of Specklinia carinifera (Barb.Rodr.) Luer 2004
- Pleurothallis carinilabia (Costa Rica to Panama).
- Pleurothallis carnosifolia (Peru) - now synonym of Specklinia carnosifolia (C.Schweinf.) Luer 2004
- Pleurothallis carnosilabia (C. America) - now synonym of Dracontia carnosilabia (A.H.Heller & Hawkes) Luer 2004
- Pleurothallis caroli (Brazil - Rio Grande do Sul).
- Pleurothallis carpinterae (Costa Rica to Panama) - now synonym of Elongatia carpinterae (Schltr.) Luer 2004
- Pleurothallis carrenoi (Venezuela).
- Pleurothallis carrisii (Brazil - Rio de Janeiro) - now synonym of Specklinia carrisii (Brade) Luer 2004
- Pleurothallis carvalhoi - now synonym of Specklinia carvalhoi (Luer & Toscano) Luer 2004
- Pleurothallis casapensis (Panama to S. Trop. America).
- Pleurothallis cassidata (Colombia).
- Pleurothallis cassidis (W .South America) - now synonym of Crocodeilanthe cassidis (Lindl.) Luer 2004
- Pleurothallis castellensis - now synonym of Specklinia castellensis (Brade) Luer 2004
- Pleurothallis casualis (Costa Rica) - now synonym of Specklinia casualis (Ames) Luer 2004
- Pleurothallis catoxys (Ecuador) - now synonym of Specklinia catoxys (Luer & Hirtz) Luer 2004
- Pleurothallis cauda-hirundinis (Ecuador).
- Pleurothallis cauda-phocae (Ecuador)
- Pleurothallis caudatipetala (W. South America) - now synonym of Specklinia caudatipetala (C.Schweinf.) Luer 2004
- Pleurothallis cauliflora (nom. inval.) (Ecuador to Peru) - now synonym of Crocodeilanthe cauliflora (Lindl.) Luer 2004
- Pleurothallis caymanensis (Cayman Is., W. Cuba) - now synonym of Proctoria caymanensis (C.D.Adams) Luer 2004
- Pleurothallis cedrinorum (Ecuador) .
- Pleurothallis centranthera (Brazil)
- Pleurothallis cerberus (Bolivia) .
- Pleurothallis cernua (Ecuador).
- Pleurothallis cestrochila (Colombia to Ecuador).
- Pleurothallis chachatoynsis (Colombia).
- Pleurothallis chama (Ecuador).
- Pleurothallis chamelopoda (Colombia) - now synonym of Acianthera chamelopoda (Luer) Luer 2004
- Pleurothallis chanchamayoensis (Peru).
- Pleurothallis chavezii (Costa Rica).
- Pleurothallis chionopa (Ecuador) .
- Pleurothallis chlorina (Ecuador) - now synonym of Specklinia chlorina (Luer) Luer 2004
- Pleurothallis chloroleuca (Costa Rica to Ecuador).
- Pleurothallis choerorhyncha (Colombia) - now synonym of Crocodeilanthe choerorhyncha (Luer) Luer 2004
- Pleurothallis chontalensis (C. America) - now synonym of Specklinia chontalensis (A.H.Heller & Hawkes) Luer 2004
- Pleurothallis chrysantha (C. & SW. Mexico).
- Pleurothallis chuscalica (Colombia).
- Pleurothallis ciliifera (Dominican Rep.) - now synonym of Specklinia ciliifera (Luer) Luer 2004
- Pleurothallis ciliolata (S. Trop. America) - now synonym of Specklinia ciliolata (Schltr.) Luer 2004
- Pleurothallis circinata (Colombia).
- Pleurothallis circumplexa (Mexico to C. America).
- Pleurothallis citrina - now synonym of Specklinia citrina (Schltr.) Luer 2004
- Pleurothallis clandestina (NW. Venezuela, Ecuador) - now synonym of Specklinia clandestina (Lindl.) Luer 2004
- Pleurothallis claudii (Dominican Rep.).
- Pleurothallis claviculata (Ecuador) - now synonym of Specklinia claviculata (Luer & Hirtz) Luer 2004
- Pleurothallis clavigera (Ecuador).
- Pleurothallis cleistogama (Panama).
- Pleurothallis cobanensis (Mexico - Veracruz, Oaxaca, Chiapas to C. America) - now synonym of Dracontia cobanensis (Schltr.) Luer 2004
- Pleurothallis cobriformis (Panama).
- Pleurothallis cocornaensis (Colombia) - now synonym of Specklinia cocornaensis (Luer & R.Escobar) Luer 2004
- Pleurothallis coeloglossa (SE. Ecuador) - now synonym of Specklinia coeloglossa (Luer & Hirtz) Luer 2004
- Pleurothallis cogniauxiana (Costa Rica to Ecuador).
- Pleurothallis colnagoi (Brazil).
- Pleurothallis colorata (Brazil - Paraná).
- Pleurothallis colossus (Costa Rica to NW. Ecuador)
- Pleurothallis comayaguensis (Mexico - Chiapas to C. America) - now synonym of Specklinia comayaguensis (Ames) Luer 2004
- Pleurothallis complanata (Ecuador) .
- Pleurothallis compressa (Costa Rica).
- Pleurothallis compressicaulis (Haiti) .
- Pleurothallis concaviflora (Costa Rica).
- Pleurothallis concinna (Bolivia) - now synonym of Specklinia concinna (Luer & R.Vásquez) Luer 2004
- Pleurothallis condorensis (SE. Ecuador) - now synonym of Ancipitia condorensis (Luer & Hirtz) Luer 2004
- Pleurothallis condylata (Costa Rica to Panama).
- Pleurothallis conicostigma (NW. Ecuador).
- Pleurothallis conochila (Costa Rica) - now synonym of Dracontia conochila (Luer) Luer 2004
- Pleurothallis consatae (Bolivia) - now synonym of Acianthera consatae (Luer & R.Vásquez) Luer 2004
- Pleurothallis conspersa (Brazil - Rio de Janeiro) - now synonym of Specklinia conspersa (Hoehne) Luer 2004
- Pleurothallis constricta (Colombia).
- Pleurothallis convallaria (C. America) - now synonym of Specklinia convallaria (Schltr.) Luer 2004
- Pleurothallis convallium (Brazil - Paraná).
- Pleurothallis convergens (Brazil).
- Pleurothallis convexa (NW. Ecuador).
- Pleurothallis convexifolia (Brazil - Minas Gerais).
- Pleurothallis convoluta (Colombia) - now synonym of Specklinia convoluta (Lindl.) Luer 2004
- Pleurothallis cordata (W. South America to Venezuela).
- Pleurothallis cordatifolia (Dominican Rep.)
- Pleurothallis cordifolia (C. America to Ecuador).
- Pleurothallis cordilabia (Brazil) - now synonym of Specklinia cordilabia (Pabst) Luer 2004
- Pleurothallis coriacardia (W. South America to Venezuela).
- Pleurothallis coripatae (Bolivia) - now synonym of Specklinia coripatae (Luer & R.Vásquez) Luer 2004
- Pleurothallis corniculata (C. America to Suriname).
- Pleurothallis cornualis (Colombia to Ecuador).
- Pleurothallis coronula (Colombia) - now synonym of Specklinia coronula (Luer) Luer 2004
- Pleurothallis correllii (Mexico - Chiapas to C. America).
- Pleurothallis corticicola (Brazil - São Paulo) - now synonym of Specklinia corticicola (Schltr. ex Hoehne) Luer 2004
- Pleurothallis corynetes (Bolivia) .
- Pleurothallis corysta (Ecuador) .
- Pleurothallis cosangae (Ecuador) - now synonym of Crocodeilanthe cosangae (Luer & Hirtz) Luer 2004
- Pleurothallis cosmetron (Colombia).
- Pleurothallis costabilis (Bolivia) - now synonym of Acianthera costabilis (Luer & R.Vásquez) Luer 2004
- Pleurothallis costaricensis (Costa Rica to W. Ecuador).
- Pleurothallis cotyligera (Colombia).
- Pleurothallis crassicaulis (Brazil - Rio de Janeiro).
- Pleurothallis crassilabia (Costa Rica) - now synonym of Acianthera crassilabia (Ames & C.Schweinf.) Luer 2004
- Pleurothallis crateriformis (Peru) .
- Pleurothallis crebrifolia (Brazil - Rio de Janeiro) - now synonym of Specklinia crebifolia (Barb.Rodr.) Luer 2004
- Pleurothallis cremasta (Ecuador) - now synonym of Acianthera cremasta (Luer & J.Portilla) Luer 2004
- Pleurothallis crenata (Mexico - Chiapas to C. America) - now synonym of Specklinia crenata (Lindl.) Luer
- Pleurothallis crepiniana (Brazil - Minas Gerais).
- Pleurothallis crescentilabia (Costa Rica).
- Pleurothallis crinita (Brazil to Bolivia) - now synonym of Specklinia crinita (Barb.Rodr.) Luer 2004
- Pleurothallis cristata (Brazil - Rio de Janeiro).
- Pleurothallis croatii (Panama) - now synonym of Crocodeilanthe croatii (Luer) Luer 2004
- Pleurothallis crocea (Brazil - Rio de Janeiro).
- Pleurothallis crocodiliceps (S. Mexico to Peru) - now synonym of Ancipitia crocodiliceps (Rchb.f.) Luer 2004
- Pleurothallis crossota (Ecuador) .
- Pleurothallis crucifera (NW. Ecuador).
- Pleurothallis cryptantha (SE. Brazil) - now synonym of Specklinia cryptantha (Barb.Rodr.) Luer 2004
- Pleurothallis cryptophoranthoides (S. Brazil) - now synonym of Acianthera cryptophoranthoides (Loefgr.) Luer 2004
- Pleurothallis cuatrecasasii (Colombia) - now synonym of Crocodeilanthe cuatrecasasii (Luer) Luer 2004
- Pleurothallis cubitoria (Ecuador) .
- Pleurothallis cucumeris (Panama) - now a synonym of Cucumeria cucumeris (Luer) Luer 2004
- Pleurothallis cultellifolis (Brazil - Minas Gerais).
- Pleurothallis cunabularis (Colombia).
- Pleurothallis cundinamarcae (Colombia).
- Pleurothallis cuneifolia (Brazil - Rio de Janeiro).
- Pleurothallis curti-bradei - now synonym of Specklinia curti-bradei (Pabst) Luer 2004
- Pleurothallis curtii (Brazil - São Paulo).
- Pleurothallis curtisii (Haiti).
- Pleurothallis curvifructa (Guyana).
- Pleurothallis cuspidata (Costa Rica to Ecuador) - now synonym of Specklinia cuspidata (Luer) Luer 2004
- Pleurothallis cutucuensis (E. Ecuador) .
- Pleurothallis cyanea (Colombia).
- Pleurothallis cyathiflora (Peru to Bolivia) - now synonym of Crocodeilanthe cyathiflora (C.Schweinf.) Luer 2004
- Pleurothallis cycesis (Colombia) - now synonym of Specklinia cycesis (Luer & R.Escobar) Luer 2004
- Pleurothallis cylindrica (Ecuador) .
- Pleurothallis cymbiformis (Dominican Rep.)
- Pleurothallis cymbisepala (S. Colombia, S. Ecuador).
- Pleurothallis cynocephala (Bolivia)
- Pleurothallis cypelligera (Ecuador) - now synonym of Ancipitia cypelligera (Luer & Hirtz) Luer 2004
- Pleurothallis cypripedioides (Ecuador) - now synonym of Specklinia cypripedioides (Luer) Luer 2004
- Pleurothallis dalessandroi (Ecuador) - now synonym of Specklinia dalessandroi (Luer) Luer 2004
- Pleurothallis dasychila (Ecuador to Peru).
- Pleurothallis dasypetala (Ecuador).
- Pleurothallis deborana (Venezuela) - now synonym of Specklinia deborana (Carnevali & I.Ramírez) Luer 2004
- Pleurothallis decipiens (Costa Rica to Venezuela and Ecuador).
- Pleurothallis declivis (Ecuador to Peru).
- Pleurothallis decurrens (S. Ecuador to N. Peru).
- Pleurothallis deflexa (Ecuador).
- Pleurothallis dejavu (Ecuador) .
- Pleurothallis delascioi (Venezuela).
- Pleurothallis delicatula (Jamaica) - now a synonym of Specklinia delicatula (Lindl.) Luer 2004
- Pleurothallis deltoglossa (Brazil) - now a synonym of Specklinia deltoglossa (Cogn.) Luer 2004
- Pleurothallis demissa (Bolivia) .
- Pleurothallis denticulata (Cuba) - now a synonym of Specklinia denticulata (Cogn.) Luer 2004
- Pleurothallis dentipetala (Costa Rica).
- Pleurothallis depauperata - now a synonym of Specklinia depauperata (Cogn.) Luer 2004
- Pleurothallis depressa (Colombia).
- Pleurothallis deserta (Bolivia) - now synonym of Acianthera deserta (Luer & R.Vásquez) Luer 2004
- Pleurothallis determannii (N. & W. South America) - now a synonym of Specklinia determannii (Luer) Luer 2004
- Pleurothallis dewildei (Colombia).
- Pleurothallis diabolica (Colombia to Ecuador).
- Pleurothallis dibolia (W. Ecuador).
- Pleurothallis dichotoma (Peru).
- Pleurothallis dichroa (Brazil).
- Pleurothallis digitale (Mexico - Veracruz, Oaxaca).
- Pleurothallis dilatata (Peru) - now a synonym of Specklinia dilatata (C.Schweinf.) Luer 2004
- Pleurothallis dilemma (Ecuador).
- Pleurothallis dimidia (W. South America to Venezuela) - now a synonym of Specklinia dimidia (Luer) Luer 2004
- Pleurothallis diminuta (Ecuador) - now synonym of Specklinia diminuta (Luer) Luer 2004
- Pleurothallis discalis - now synonym of Specklinia discalis (Luer & J.Portilla) Luer 2004
- Pleurothallis discoidea (Trop. America).
- Pleurothallis discophylla (W. South America to Venezuela) - now synonym of Acianthera discophylla (Luer & Carnevali) Luer 2004
- Pleurothallis displosa (Panama).
- Pleurothallis divaricans (Panama to Bolivia).
- Pleurothallis dodii (Dominican Rep.) - now synonym of Specklinia dodii (Garay) Luer 2004
- Pleurothallis dodsonii (Ecuador) - now synonym of Apoda-prorepentia dodsonii (Luer) Luer 2004
- Pleurothallis dolichopus - now synonym of Specklinia dolichopus (Schltr.) Luer 2004
- Pleurothallis domingensis Guadeloupe Bonnet Orchid (Caribbean) - now synonym of Crocodeilanthe domingensis (Cogn.) Luer 2004
- Pleurothallis dorotheae (Costa Rica).
- Pleurothallis dorrii (Venezuela).
- Pleurothallis dracontea (Costa Rica) - now synonym of Dracontia dracontea (Luer) Luer 2004
- Pleurothallis dracula (Brazil - Rio de Janeiro).
- Pleurothallis dressleri (Panama) - now synonym of Areldia dressleri (Luer) Luer 2004
- Pleurothallis drewii (Ecuador).
- Pleurothallis driessenii (Ecuador) - now synonym of Ancipitia driessenii (Luer) Luer 2004
- Pleurothallis dryadum (Brazil - São Paulo) - now synonym of Specklinia dryadum (Schltr.) Luer 2004
- Pleurothallis duartei (Brazil - São Paulo) - now synonym of Specklinia duartei (Hoehne) Luer 2004
- Pleurothallis dukei (Panama).
- Pleurothallis dunstervillei (W. South America to NW. Venezuela) - now synonym of Ancipitia dunstervillei (Foldats) Luer 2004
- Pleurothallis duplex (Colombia) - now synonym of Ancipitia duplex (Luer & R.Escobar) Luer 2004
- Pleurothallis duplooyi (Belize) - now synonym of Specklinia duplooyi (Luer & Sayers) Luer 2004
- Pleurothallis dutrae - now synonym of Specklinia dutrae (Pabst) Luer 2004
- Pleurothallis dutrai (Brazil) - now synonym of Acianthera dutrae (Pabst) C.N.Gonç. & Waechter 2004
- Pleurothallis eccentrica (Ecuador) .
- Pleurothallis echinantha (Brazil, SE. Brazil).
- Pleurothallis echinocarpa (S. Ecuador to Peru) - now synonym of Kraenzlinella echinocarpa (C.Schweinf.) Luer
- Pleurothallis echinodes (Colombia).
- Pleurothallis eidos (Ecuador).
- Pleurothallis ekmanii (E. Cuba) - now synonym of Atopoglossum ekmanii (Schltr.) Luer 2004
- Pleurothallis elegans (Venezuela to Ecuador) - now synonym of Crocodeilanthe elegans (Kunth) Luer 2004
- Pleurothallis elegantula (Brazil) - now synonym of Specklinia elegantula (Cogn.) Luer 2004
- Pleurothallis ellipsophylla (Costa Rica to Panama).
- Pleurothallis elvirana (Venezuela).
- Pleurothallis emarginata (Peru).
- Pleurothallis endotrachys (Mexico - Oaxaca, Chiapas to NW. Venezuela) - now synonym of Empusella endotrachys (Rchb.f.) Luer 2004
- Pleurothallis endresii (Costa Rica) - now synonym of Specklinia endresii (Luer) Luer 2004
- Pleurothallis ensata (Ecuador).
- Pleurothallis ephemera (Guianas to Bolivia) - now synonym of Specklinia ephemera (Lindl.) Luer 2004
- Pleurothallis epiglottis (Ecuador) .
- Pleurothallis erebatensis (Venezuela) - now synonym of Acianthera erebatensis (Carnevali & G.A.Romero) Luer, 2004
- Pleurothallis erectiflora - now synonym of Crocodeilanthe erectiflora (Luer & Hirtz) Luer 2004
- Pleurothallis erinacea (SE. Mexico to Guyana and Bolivia) - now synonym of Kraenzlinella erinacea (Rchb.f.) Luer
- Pleurothallis erosa (Cuba to Hispaniola) - now synonym of Antilla erosa (Urb.) Luer 2004
- Pleurothallis erucosa (Colombia) - now synonym of Specklinia erucosa (Luer & R.Escobar) Luer 2004
- Pleurothallis erymnochila (Ecuador) .
- Pleurothallis erythrogramma (E. Ecuador to N. Peru) - now synonym of Acianthera erythrogramma (Luer & Carnevali) Luer 2004
- Pleurothallis escalerensis - now synonym of Specklinia escalerensis (Carnevali & Luer) Luer 2004
- Pleurothallis esmeraldae (Ecuador) - now synonym of Acianthera esmeraldae (Luer & Hirtz) Luer 2004
- Pleurothallis eugenii (Brazil - São Paulo) - now synonym of Specklinia eugenii (Pabst) Luer 2004
- Pleurothallis eumecocaulon (Costa Rica) - now synonym of Ancipitia eumecocaulon (Schltr.) Luer 2004
- Pleurothallis exarticulata (Brazil - Rio de Janeiro).
- Pleurothallis excavata (Costa Rica).
- Pleurothallis excelsa (Colombia to Ecuador) - now synonym of Elongatia excelsa (Garay) Luer 2004
- Pleurothallis excentrica (Cuba)
- Pleurothallis exdrasii - now synonym of Acianthera exdrasii (Luer & Toscano) Luer
- Pleurothallis exesilabia (Nicaragua, Venezuela, Ecuador).
- Pleurothallis exigua (Guyana, SE. Brazil)
- Pleurothallis exilis (Venezuela) - now synonym of Specklinia exilis (C.Schweinf.) Luer 2004
- Pleurothallis eximia (Mexico - Oaxaca) - now synonym of Acianthera eximia (L.O.Williams) Luer 2004
- Pleurothallis expansa (SW. Colombia to NW. Ecuador) - now synonym of Crocodeilanthe expansa (Lindl.) Luer 2004
- Pleurothallis exserta (NW. Ecuador).
- Pleurothallis ezechiasi - now synonym of Specklinia ezechiasi (Hoehne) Luer 2004
- Pleurothallis fabiobarrosii (Brazil - Minas Gerais).
- Pleurothallis fantastica (Costa Rica).
- Pleurothallis farinosa (Brazil - Espírito Santo) - now synonym of Acianthera farinosa (Pabst) Luer 2004
- Pleurothallis fastidiosa (E. Ecuador).
- Pleurothallis fastigiata - now synonym of Specklinia fastigiata (Luer & Toscano) Luer 2004
- Pleurothallis fenestrata (SE. & S. Brazil).
- Pleurothallis ferdinandiana (Brazil - Rio de Janeiro).
- Pleurothallis fernandiana (Brazil).
- Pleurothallis feuilletii Luer (French Guiana) (invalid name) - now synonym of Specklinia feuilletii Luer 2004
- Pleurothallis filiformis (Brazil - Rio de Janeiro) - now synonym of Specklinia filiformis (Cogn.) Luer 2004
- Pleurothallis flaccida (Trop. America (?)).
- Pleurothallis flammea (Brazil - Rio de Janeiro).
- Pleurothallis flaveola (NW. Ecuador).
- Pleurothallis flexuosa (W. South America to Venezuela).
- Pleurothallis floribunda (Costa Rica to Bolivia) - now synonym of Crocodeilanthe floribunda (Poepp. & Endl.) Luer 2004
- Pleurothallis flosculifera (Dominican Rep) - now synonym of Specklinia flosculifera (Luer) Luer 2004
- Pleurothallis fluminensis (Brazil) - now synonym of Specklinia fluminensis (Pabst) Luer 2004
- Pleurothallis fockei (N. South America to N. Brazil).
- Pleurothallis fons-florum (Ecuador to Peru) - now synonym of Crocodeilanthe fons-florum (Lindl.) Luer 2004
- Pleurothallis forceps-cancri (Colombia).
- Pleurothallis formondii (Haiti) .
- Pleurothallis fornicata (Ecuador to Peru) - now synonym of Specklinia fornicata (Luer) Luer 2004
- Pleurothallis fornix (Colombia).
- Pleurothallis fortunae (Panama) - now synonym of Dracontia fortunae (Luer & Dressler) Luer 2004
- Pleurothallis fossulata (Colombia).
- Pleurothallis fractiflexa (Costa Rica to Panama) - now synonym of Specklinia fractiflexa (Ames & C.Schweinf.) Luer 2004
- Pleurothallis francesiana - now synonym of Specklinia francesiana (Luer) Luer 2004
- Pleurothallis fritziiv (Venezuela).
- Pleurothallis fuchsii (Ecuador) - now synonym of Specklinia fuchsii (Luer) Luer 2004
- Pleurothallis fuegi (Mexico - Guerrero, Chiapas to C. America) - now synonym of Specklinia fuegii (Rchb.f.) Luer 2004
- Pleurothallis fugax (Colombia).
- Pleurothallis fulgens (Costa Rica).
- Pleurothallis fumioi (Bolivia) - now synonym of Acianthera fumioi (T.Hashim.) Luer 2004
- Pleurothallis funerea (N. Brazil) - now synonym of Specklinia funerea (Barb.Rodr.) Luer 2004
- Pleurothallis furcatipetala (Ecuador) - now synonym of Specklinia furcatipetala (Luer & Hirtz) Luer 2004
- Pleurothallis furcifera (Peru) - now synonym of Ancipitia furcifera (Luer) Luer 2004
- Pleurothallis fustifera (Peru) - now synonym of Lindleyalis fustifera (Luer) Luer 2004
- Pleurothallis galeata (W. South America to NW. Venezuela) - now synonym of Crocodeilanthe galeata (Lindl.) Luer 2004
- Pleurothallis galerasensis (Colombia) - now synonym of Crocodeilanthe galerasensis (Luer) Luer 2004
- Pleurothallis galerita (Ecuador) .
- Pleurothallis ganymedes (Colombia).
- Pleurothallis garayana (Colombia).
- Pleurothallis garayi (Brazil) - now synonym of Specklinia garayi (Pabst) Luer 2004
- Pleurothallis garciae (Venezuela).
- Pleurothallis gargantua (Ecuador).
- Pleurothallis gehrtii (Brazil - São Paulo) - now synonym of Specklinia gehrtii (Hoehne & Schltr.) Luer 2004
- Pleurothallis gelida (S. Florida, Caribbean, Mexico to Peru) - now synonym of Specklinia gelida (Lindl.) Luer 2004
- Pleurothallis gemina (Cuba).
- Pleurothallis geminicaulina (Costa Rica to Ecuador).
- Pleurothallis geminiflora (Costa Rica).
- Pleurothallis genychila (S. Ecuador to N. Peru).
- Pleurothallis geographica (Ecuador).
- Pleurothallis gert-hatschbachii (Brazil - Paraná) - now synonym of Specklinia gert-hatschbachii (Hoehne) Luer 2004
- Pleurothallis ghillanyi (Brazil - São Paulo) - now synonym of Specklinia ghillanyi (Pabst) Luer 2004
- Pleurothallis gigantea (Peru) - now synonym of Kraenzlinella gigantea (Lindl.) Luer
- Pleurothallis gigas (Colombia) - now synonym of Crocodeilanthe gigas (Luer & R.Escobar) Luer 2004
- Pleurothallis giraffa (Ecuador).
- Pleurothallis giraldoi (Colombia).
- Pleurothallis githaginea (Brazil - Rio de Janeiro) - now synonym of Specklinia githaginea (Pabst & Garay) Luer 2004
- Pleurothallis glabra (Colombia).
- Pleurothallis glanduligera (E. Brazil) - now synonym of Acianthera glanduligera (Lindl.) Luer 2004
- Pleurothallis glandulipetala (Bolivia) - now synonym of Specklinia glandulipetala (Luer) Luer 2004
- Pleurothallis glandulosa (Mexico - Chiapas to N. South America).
- Pleurothallis glaucophylla (Brazil - Minas Gerais).
- Pleurothallis glaziovii (SE. Brazil).
- Pleurothallis globifera (Brazil - Santa Catarina).
- Pleurothallis globosa (Colombia).
- Pleurothallis glochis (Colombia to Ecuador).
- Pleurothallis glossochila (Brazil - Paraná).
- Pleurothallis glossopogon (Colombia to N. Venezuela) - now synonym of Lindleyalis glossopogon (Rchb.f.) Luer 2004
- Pleurothallis glumacea (SE. Brazil) L
- Pleurothallis gomesii-ferreirae (Brazil) - now synonym of Specklinia gomesii-ferreirae (Pabst) Luer 2004
- Pleurothallis gomezii (Colombia).
- Pleurothallis gongylodes (Ecuador).
- Pleurothallis gonzalezii (Brazil) - now synonym of Specklinia gonzalezii (Pabst) Luer 2004
- Pleurothallis gouveiae (Brazil - Paraná).
- Pleurothallis gracilenta (Bolivia) - now synonym of Specklinia gracilenta (Luer & R.Vásquez) Luer 2004
- Pleurothallis gracilipedunculata (NW. Venezuela) .
- Pleurothallis gracilis (Brazil - Minas Gerais).
- Pleurothallis gracilisepala (Brazil - Paraná) - now synonym of Acianthera gracilisepala (Brade) Luer 2004
- Pleurothallis gracillima (SW. Colombia to Ecuador).
- Pleurothallis grandiflora (W. South America to NW. Venezuela).
- Pleurothallis grandis (Costa Rica) - now synonym of Dracontia grandis (Rolfe) Luer 2004
- Pleurothallis granitica (Venezuela) - now synonym of Acianthera granitica (Luer & G.A.Romero) Luer 2004
- Pleurothallis granularis (Colombia).
- Pleurothallis granulosa (Brazil - Rio de Janeiro) - now synonym of Specklinia granulosa (Barb.Rodr.) Luer 2004
- Pleurothallis gratiosa (N. Venezuela) - now synonym of Ancipitia gratiosa (Rchb.f.) Luer 2004
- Pleurothallis graveolens (Brazil) - now synonym of Specklinia graveolens (Pabst) Luer 2004
- Pleurothallis grayumii (Costa Rica) - now synonym of Specklinia grayumii (Luer) Luer 2004
- Pleurothallis grisebachiana (Cuba) - now synonym of Specklinia grisebachiana (Cogn.) Luer 2004
- Pleurothallis grobyi (C. & W. South America).
- Pleurothallis guanacastensis (Costa Rica).
- Pleurothallis guarujaensis (Brazil - São Paulo).
- Pleurothallis guimaraensii (Brazil - Paraná) - now synonym of Specklinia guimaraensii (Brade) Luer 2004
- Pleurothallis gutierrezii (Bolivia).
- Pleurothallis guttata (Costa Rica to Panama).
- Pleurothallis guttulata (Brazil - Rio de Janeiro) - now synonym of Elongatia guttata (Luer) Luer 2004
- Pleurothallis habenula (S. Colombia to N. Ecuador).
- Pleurothallis haberi - now synonym of Specklinia haberi (Luer) Luer 2004
- Pleurothallis haitiensis (Haiti).
- Pleurothallis hamiltonii (in error) - now synonym of Specklinia hamiltonii (Luer) Luer 2004
- Pleurothallis hammelii (Panama).
- Pleurothallis hamosa (Brazil - Bahia, Minas Gerais).
- Pleurothallis handroi (Brazil - São Paulo).
- Pleurothallis harlingii (SW. Ecuador).
- Pleurothallis harpago (Panama) - now synonym of Ancipitia harpago (Luer) Luer 2004
- Pleurothallis harpophylla - now synonym of Acianthera harpophylla (Rchb.f.) Luer 2004
- Pleurothallis hartwegii (S. Colombia, S. Ecuador).
- Pleurothallis hastulata (Brazil - Minas Gerais) - now synonym of Specklinia hastulata (Rchb.f. & Warm.) Luer 2004
- Pleurothallis hatschbachii (Brazil to Argentina) .
- Pleurothallis heliconioides (Bolivia).
- Pleurothallis heliconiscapa (Brazil - Rio Grande do Norte) - now synonym of Specklinia heliconiscapa (Hoehne) Luer 2004
- Pleurothallis helleri (Nicaragua to W. Ecuador).
- Pleurothallis helleriana (Costa Rica).
- Pleurothallis helmutii (SE. Brazil) - now synonym of Specklinia helmutii (Hoehne) Luer 2004
- Pleurothallis hemileuca (Panama).
- Pleurothallis hemirhoda - now synonym of Lindleyalis hemirhoda (Lindl. & Paxton) Luer 2004
- Pleurothallis hemisphaerica (Colombia).
- Pleurothallis henniae (cuador).
- Pleurothallis henrici (W. Ecuador) - now synonym of Acianthera henrici (Schltr.) Luer 2004
- Pleurothallis henrique-aragonii (Brazil) - now synonym of Specklinia henrique-aragonii (Pabst) Luer 2004
- Pleurothallis heringeri (Brazil - Minas Gerais) - now synonym of Acianthera heringeri (Hoehne) Luer 2004
- Pleurothallis herpestes (Costa Rica).
- Pleurothallis herpethophyton (Bolivia) - now synonym of Specklinia herpethophyton (Schltr.) Luer 2004
- Pleurothallis herrerae (Guatemala) - now synonym of Brenesia herrerae (Luer) Luer 2004
- Pleurothallis heteropetala (Ecuador) .
- Pleurothallis heterophylla (Brazil - Rio de Janeiro) - now synonym of Specklinia heterophylla (Barb.Rodr.) Luer 2004
- Pleurothallis hexandra (Venezuela).
- Pleurothallis hians (SE. Brazil) - now synonym of Specklinia hians (Lindl.) Luer 2004
- Pleurothallis hilariana (Venezuela).
- Pleurothallis hintonii (Mexico - Guerrero) - now synonym of Kraenzlinella hintonii (L.O.Williams) Luer
- Pleurothallis hippocrepica (Colombia to Ecuador).
- Pleurothallis hirsutula (Jamaica).
- Pleurothallis hitchcockii (N. & W. South America) - now synonym of Talpinaria hitchcockii (Ames) Luer 2004
- Pleurothallis hjertingii (Peru).
- Pleurothallis hoehnei (Brazil - São Paulo).
- Pleurothallis hoeijeri (Ecuador) .
- Pleurothallis hoffmannseggiana (Brazil - Rio de Janeiro - now synonym of Acianthera hoffmannseggiana (Rchb.f.) Luer 2004
- Pleurothallis holstii (Venezuela).
- Pleurothallis holtonii (Colombia) - now synonym of Elongatia holtonii (Luer) Luer 2004
- Pleurothallis homalantha (C. America).
- Pleurothallis hondurensis (Mexico - Chiapas to C. America).
- Pleurothallis humilis (Venezuela) - now synonym of Specklinia humilis (C.Schweinf.) Luer 2004
- Pleurothallis hygrophila (Brazil to Argentina) - now synonym of Specklinia hygrophila (Barb.Rodr.) Luer 2004
- Pleurothallis hymenantha (Guyana to Brazil)
- Pleurothallis hypnicola (Brazil - Rio de Janeiro).
- Pleurothallis ichthyonekys (Ecuador).
- Pleurothallis ignota - now synonym of Specklinia ignota (Luer) Luer 2004
- Pleurothallis iguapensis - now synonym of Acianthera iguapensis (Schltr.) F. Barros 2004
- Pleurothallis illudens (Brazil - Santa Catarina).
- Pleurothallis imago (Panama).
- Pleurothallis imbaburae (Ecuador) .
- Pleurothallis imbeana (Brazil - Rio de Janeiro).
- Pleurothallis imber-florum (Colombia).
- Pleurothallis imberbis (Ecuador to Bolivia) - now synonym of Specklinia imberbis (Luer & Hirtz) Luer 2004
- Pleurothallis imbricata (Brazil - Minas Gerais) - now synonym of Specklinia imbricata (Barb.Rodr.) Luer 2004
- Pleurothallis imitor (Costa Rica).
- Pleurothallis immersa : Black Orchid (Mexico to N. Venezuela) - now synonym of Specklinia immersa (Linden & Rchb.f.) Luer 2004
- Pleurothallis imperialis (Ecuador).
- Pleurothallis implexa (Ecuador).
- Pleurothallis imraei (Trop. America) - now synonym of Specklinia imraei (Lindl.) Luer 2004
- Pleurothallis inaequalis (Brazil).
- Pleurothallis incongrua (Colombia).
- Pleurothallis index (Colombia to Ecuador).
- Pleurothallis infinata (Bolivia) - now synonym of Specklinia infinita (Luer & Hirtz) Luer 2004
- Pleurothallis inflata (Colombia to Ecuador).
- Pleurothallis infundibulosa (Colombia) - now synonym of Crocodeilanthe infundibulosa (Luer) Luer 2004
- Pleurothallis ingramii (Costa Rica) - now synonym of Dracontia ingramii (Luer) Luer 2004
- Pleurothallis inornata (Ecuador) - now synonym of Ancipitia inornata (Luer & Hirtz) Luer 2004
- Pleurothallis instar (Panama).
- Pleurothallis insularis (Brazil - São Paulo).
- Pleurothallis intonsa (Colombia).
- Pleurothallis inversa (Bolivia) - now synonym of Specklinia inversa (Luer & R.Vásquez) Luer 2004
- Pleurothallis involuta - now synonym of Specklinia involuta (L.O.Williams) Luer 2004
- Pleurothallis iota (Ecuador) - now synonym of Specklinia iota (Luer) Luer 2004
- Pleurothallis ipyrangana (Brazil - Paraná).
- Pleurothallis isthmica (Costa Rica to Panama).
- Pleurothallis jacarepaguaensis (Brazil - Rio de Janeiro).
- Pleurothallis jaculifera (Colombia).
- Pleurothallis jalapensis (Mexico - Chiapas to Guatemala) - now synonym of Specklinia jalapensis (Kraenzl.) Luer 2004
- Pleurothallis jamaicensis (Jamaica) - now synonym of Specklinia jamaicensis (Rolfe) Luer 2004
- Pleurothallis jamiesonii (S. Colombia to Ecuador) - now synonym of Crocodeilanthe jamesonii (Lindl.) Luer 2004
- Pleurothallis janetiae (Costa Rica) - now synonym of Elongatia janetiae (Luer) Luer 2004
- Pleurothallis jaramilloi (Colombia).
- Pleurothallis jesupii (Dominican Rep.) - now synonym of Specklinia jesupii (Luer) Luer 2004
- Pleurothallis jesupiorum (Ecuador) - now synonym of Specklinia jesupiorum (Luer & Hirtz) Luer 2004
- Pleurothallis jimii Luer - now synonym of Ancipitia jimii (Luer) Luer 2004
- Pleurothallis jocolensis (Guatemala).
- Pleurothallis johannensis (SE. Brazil)
- Pleurothallis johnsonii (Mexico - Oaxaca, Chiapas to C. America) - now synonym of Brenesia johnsonii (Ames) Luer 2004
- Pleurothallis jordanensis (Brazil - São Paulo) - now synonym of Specklinia jordanensis (Hoehne) Luer 2004
- Pleurothallis jupiter (Ecuador).
- Pleurothallis jurisdixii (Colombia) - now synonym of Crocodeilanthe jurisdixii (Luer & R.Escobar) Luer 2004
- Pleurothallis juxtaposita (Panama) - now synonym of Acianthera juxtaposita (Luer) Luer 2004
- Pleurothallis kareniae (Costa Rica) - now synonym of Unciferia kareniae (Luer) Luer 2004
- Pleurothallis karlii (Brazil - Rio Grande do Sul) - now synonym of Acianthera karlii (Pabst) C.N.Gonç. & Waechter 2004
- Pleurothallis kateora (Colombia) - now synonym of Apoda-prorepentia kateora (Luer) Luer 2004
- Pleurothallis kautskyi (Brazil - Espírito Santo) - now synonym of Specklinia kautskyi (Pabst) Luer 2004
- Pleurothallis kegelii (Suriname) - now synonym of Acianthera kegelii (Rchb.f.) Luer 2004
- Pleurothallis kennedyi (Peru)
- Pleurothallis kerrii (NE. Peru to Brazil) - now synonym of Madisonia kerrii (Braga) Luer 2004
- Pleurothallis killipii (Colombia).
- Pleurothallis kleinii (Brazil) - now synonym of Specklinia kleinii (Pabst) Luer 2004
- Pleurothallis klotzschiana (SE. Brazil)
- Pleurothallis knappiae (Panama).
- Pleurothallis kraenzliniana (Brazil).
- Pleurothallis kuhniae (Peru) - now synonym of Specklinia kuhniae (Luer) Luer 2004
- Pleurothallis lacera (Ecuador)
- Pleurothallis laciniata (SE. Brazil) - now synonym of Specklinia laciniata (Barb.Rodr.) Luer 2004
- Pleurothallis laevigata (W. South America) - now synonym of Crocodeilanthe laevigata (Lindl.) Luer 2004
- Pleurothallis laevis (Ecuador) - now synonym of Crocodeilanthe laevis (Luer & Hirtz) Luer 2004
- Pleurothallis lagarophyta (Peru) - now synonym of Specklinia lagarophyta (Luer) Luer 2004
- Pleurothallis lamellaris (C. Colombia to Bolivia)
- Pleurothallis lamia (Ecuador)
- Pleurothallis laminata (Ecuador) - now synonym of Crocodeilanthe laminata (Luer) Luer 2004
- Pleurothallis lamproglossa (Brazil - Paraná)
- Pleurothallis lanceana (Trinidad, Costa Rica to S. Trop. America).
- Pleurothallis lanceola (SE. Mexico to Colombia, Jamaica).
- Pleurothallis langeana (S. Brazil)
- Pleurothallis languida (Colombia)
- Pleurothallis lappago (Ecuador) - now synonym of Kraenzlinella lappago (Luer) Luer 2004
- Pleurothallis lappiformis (Nicaragua, Ecuador) - now synonym of Brenesia lappiformis (A.H.Heller & L.O.Williams) Luer 2004
- Pleurothallis lasioglossa (Ecuador) - now synonym of Specklinia lasioglossa (Schltr.) Luer 2004
- Pleurothallis latilabris (NW. Venezuela) - now synonym of Specklinia latilabris (Foldats) Luer 2004
- Pleurothallis latipetala (Colombia)
- Pleurothallis laxa (Jamaica)
- Pleurothallis laxiflora (Brazil) - now synonym of Specklinia laxiflora (Porsch) Luer 2004
- Pleurothallis lehmanneptis - now synonym of Specklinia lehmanneptis (Luer & R.Escobar) Luer 2004
- Pleurothallis lehmanniana (S. Colombia to N. Ecuador) - now synonym of Crocodeilanthe lehmanniana (Schltr.) Luer 2004
- Pleurothallis lemniscifolia (Ecuador)
- Pleurothallis lenae (Ecuador).
- Pleurothallis lentiginosa (Costa Rica).
- Pleurothallis leontoglossa (Brazil - Rio de Janeiro) - now synonym of Specklinia leontoglossa (Rchb.f.) Luer 2004
- Pleurothallis leopardina (Ecuador)
- Pleurothallis lepanthoides - now synonym of Specklinia lepanthoides (Schltr.) Luer 2004
- Pleurothallis lepidota (Costa Rica to Panama)
- Pleurothallis leptantha (Colombia) - now synonym of Specklinia leptantha (Schltr.) Luer 2004
- Pleurothallis leptotifolia (SE. Brazil) - now synonym of Specklinia leptotifolia (Barb.Rodr.) Luer 2004
- Pleurothallis leucantha (Mexico - Chiapas to C. America)
- Pleurothallis leucopyramis (Costa Rica) - now synonym of Specklinia leucopyramis (Rchb.f.) Luer 2004
- Pleurothallis leucorhoda (Brazil - Rio Grande do Sul)
- Pleurothallis leucosepala (Brazil - São Paulo) - now synonym of Specklinia leucosepala 2004
- Pleurothallis lewisiae (Mexico to C. America) - now synonym of Specklinia lewisiae (Ames) Luer 2004
- Pleurothallis lichenicola (Cuba) - now synonym of Specklinia lichenophila (Porto & Brade) Luer 2004
- Pleurothallis lichenophila (Brazil - Rio de Janeiro) - now synonym of Specklinia lichenophila (Porto & Brade) Luer 2004
- Pleurothallis ligulata (W. South America) - now synonym of Crocodeilanthe ligulata (Lindl.) Luer 2004
- Pleurothallis lilijae (NW. Venezuela to Ecuador).
- Pleurothallis limae (Brazil - Rio de Janeiro).
- Pleurothallis limbata (Brazil - Rio de Janeiro) - now synonym of Specklinia limbata (Cogn.) Luer 2004
- Pleurothallis lindenii (W. South America to Venezuela).
- Pleurothallis linearifolia (SE. & S. Brazil to Argentina) - now synonym of Specklinia linearifolia (Cogn.) Luer 2004
- Pleurothallis linearis (Mexico).
- Pleurothallis lineolata (Brazil - Rio de Janeiro) - now synonym of Specklinia lineolata (Barb.Rodr.) Luer 2004
- Pleurothallis lingua (Brazil - Rio de Janeiro) - now synonym of Specklinia lingua (Lindl.) Luer 2004
- Pleurothallis linguifera (W. South America to Venezuela).
- Pleurothallis liparanges (Brazil) - now synonym of Specklinia liparanges (Rchb.f.) Luer 2004
- Pleurothallis lipothrix (Ecuador).
- Pleurothallis listerophora (Costa Rica to Panama) - now synonym of Specklinia listerophora (Schltr.) Luer 2004
- Pleurothallis litensis (Ecuador) - now synonym of Acianthera litensis (Luer & Hirtz) Luer 2004
- Pleurothallis lithophilav (Brazil).
- Pleurothallis litotes (S. Colombia to Ecuador).
- Pleurothallis llamachoi (Cuba) - now synonym of Specklinia llamachoi (Luer) Luer 2004
- Pleurothallis lobata (Colombia).
- Pleurothallis lobiserrata (Brazil - Rio de Janeiro).
- Pleurothallis loefgrenii (Brazil - São Paulo).
- Pleurothallis loejtnantii (Ecuador).
- Pleurothallis lojae (Costa Rica to Bolivia) - now synonym of Acianthera lojae (Schltr.) Luer 2004
- Pleurothallis londonoi (Colombia) - now synonym of Ancipitia londonoi (Luer) Luer 2004
- Pleurothallis longicaulis - now synonym of Specklinia longicaulis (Lindl.) Luer 2004
- Pleurothallis longicornu (Brazil - Paraná).
- Pleurothallis longilabris (Cuba) - now synonym of Specklinia longilabris (Lindl.) Luer 2004
- Pleurothallis longipedicellata (Costa Rica to Ecuador).
- Pleurothallis longisepala (S. Venezuela to N. Brazil).
- Pleurothallis longiserpens (Peru).
- Pleurothallis longispicata (W. Mexico) - now synonym of Specklinia longispicata (L.O.Williams) Luer 2004
- Pleurothallis lopezii (Colombia).
- Pleurothallis loranthophylla (Costa Rica to N. & W. South America).
- Pleurothallis luctuosa (Costa Rica to Ecuador).
- Pleurothallis luis-diegoi (Costa Rica) - now synonym of Specklinia luis-diegoi (Luer) Luer 2004
- Pleurothallis lunaris (Colombia).
- Pleurothallis luteola (Brazil - Rio de Janeiro).
- Pleurothallis macra (C. Ecuador).
- Pleurothallis macrantha (Costa Rica to Panama) - now synonym of Dracontia macrantha (L.O.Williams) Luer 2004
- Pleurothallis macroblepharis (C. Colombia to N. Peru).
- Pleurothallis macrophylla - now synonym of Elongatia macrophylla (Kunth) Luer 2004
- Pleurothallis macropoda (SE. Brazil).
- Pleurothallis macuconensis (Brazil - Minas Gerais) - now synonym of Acianthera macuconensis (Barb.Rodr.) Luer 2004
- Pleurothallis maculata (Brazil).
- Pleurothallis maculosa (Brazil - Paraná).
- Pleurothallis madisonii (Ecuador) .
- Pleurothallis madsenii (Ecuador).
- Pleurothallis maduroi (Panama).
- Pleurothallis magalhanesiiv (Brazil) - now synonym of Acianthera magalhanesii (Pabst) Luer 2004
- Pleurothallis magdalenae (Colombia to Ecuador).
- Pleurothallis magnicalcarata (Brazil - São Paulo).
- Pleurothallis magnifica (Colombia).
- Pleurothallis magnipetala (Peru) .
- Pleurothallis maguirei (Guyana) - now synonym of Specklinia maguirei (Luer) Luer 2004
- Pleurothallis malachantha (Brazil - Rio de Janeiro) - now synonym of Specklinia malachantha (Rchb.f.) Luer 2004
- Pleurothallis malmeana (Brazil - Rio Grande do Sul) - now synonym of Specklinia malmeana (Dutra ex Pabst) Luer 2004
- Pleurothallis mammillata (Panama).
- Pleurothallis mandonii (Ecuador, Bolivia) - now synonym of Crocodeilanthe mandonii (Rchb.f.) Luer 2004
- Pleurothallis manicosa (Colombia).
- Pleurothallis mantiguyrana (Brazil - Minas Gerais).
- Pleurothallis marthae (Colombia).
- Pleurothallis martinezii (nom. inval.) - now synonym of Acianthera martinezii (Luer) Luer 2004
- Pleurothallis marumbyana (Brazil - Paraná) - now synonym of Acianthera marumbyana (Garay) Luer 2004
- Pleurothallis masdevalliopsis (Ecuador) .
- Pleurothallis mastodon (Ecuador)
- Pleurothallis matinhensis - now synonym of Specklinia matinhensis (Hoehne) Luer 2004
- Pleurothallis matudana (S. Mexico to Bolivia)
- Pleurothallis maxima (C. Colombia to C. Ecuador) - now synonym of Crocodeilanthe maxima (Luer) Luer 2004
- Pleurothallis mazei (Guadeloupe) - now synonym of Specklinia mazei (Urb.) Luer 2004
- Pleurothallis medinae (E. Ecuador) -now synonym of Lindleyalis medinae (Luer & J.Portilla) Luer 2004 or Specklinia medinae (Luer & J.Portilla) Luer 2004 (?)
- Pleurothallis mediocarinata (Peru to Bolivia) - now synonym of Specklinia mediocarinata (C.Schweinf.) Luer 2004
- Pleurothallis medusa (Costa Rica).
- Pleurothallis megaglossa (Ecuador).
- Pleurothallis megaloophora (Ecuador) - now synonym of Specklinia megaloöphora (Luer) Luer 2004
- Pleurothallis megalops (Ecuador) .
- Pleurothallis megalorhina (Colombia).
- Pleurothallis megalotis (Ecuador).
- Pleurothallis melachila (Brazil - Rio de Janeiro) - now synonym of Acianthera melachila (Barb.Rodr.) Luer 2004
- Pleurothallis melanochthoda (Ecuador) - now synonym of Apoda-prorepentia melanochthoda (Luer & Hirtz) Luer 2004
- Pleurothallis melanoglossa (Colombia) - now synonym of Acianthera melanoglossa (Luer & R.Escobar) Luer 2004
- Pleurothallis melanostele (Bolivia).
- Pleurothallis melanosticta (Ecuador) .
- Pleurothallis membracidoides (Colombia) - now synonym of Ancipitia membracidoides (Luer) Luer 2004
- Pleurothallis mentigera (Brazil) .
- Pleurothallis mentosa (S. Trop. America) - now synonym of Specklinia mentosa (Cogn.) Luer 2004
- Pleurothallis meridana (Colombia to NW. Venezuela) - now synonym of Specklinia meridana (Rchb.f.) Luer 2004
- Pleurothallis micklowii (Bolivia).
- Pleurothallis micrantha (Brazil - Minas Gerais).
- Pleurothallis microblephara (Brazil - Paraná) - now synonym of Specklinia microblephara (Schltr.) Luer 2004
- Pleurothallis microgemma (Brazil - São Paulo).
- Pleurothallis microphylla (Mexico to C. America)
- Pleurothallis microphyta (Brazil to NE. Argentina) - now synonym of Specklinia microphyta (Barb.Rodr.) Luer 2004
- Pleurothallis microphyta var. microphyta (Brazil - Rio de Janeiro).
- Pleurothallis microphyta var. misionum (Argentina)
- Pleurothallis microtis (Brazil - Rio Grande do Sul) - now synonym of Specklinia microtis (Schltr.) Luer 2004
- Pleurothallis miguelii (Dominican Rep.) - now synonym of Acianthera miguelii (Schltr.) Luer 2004
- Pleurothallis millei (Ecuador).
- Pleurothallis millipeda (Colombia) - now synonym of Specklinia millipeda (Luer) Luer 2004
- Pleurothallis minima - now synonym of Specklinia minima (C.Schweinf.) Luer 2004
- Pleurothallis minimifolia (Brazil -(São Paulo)).
- Pleurothallis minor (C. America).
- Pleurothallis minuta (Costa Rica) - now synonym of Specklinia minuta (Ames & C.Schweinf.) Luer 2004
- Pleurothallis minutalis (S. Mexico to Guatemala) - now synonym of Specklinia minutalis (Lindl.) Luer 2004
- Pleurothallis minutissima (Colombia) - now synonym of Specklinia minutissima (Luer) Luer 2004
- Pleurothallis miqueliana (S. Trop. America).
- Pleurothallis mirabilis (Brazil - Paraná) - now synonym of Specklinia mirabilis (Schltr.) Luer 2004
- Pleurothallis miragliae - now synonym of Specklinia miragliae (Leite) Luer 2004
- Pleurothallis miranda (Ecuador).
- Pleurothallis mitchellii (Haiti) - now synonym of Specklinia mitchelii (Dod) Luer 2004
- Pleurothallis mocoana (Colombia) - now synonym of Specklinia mocoana (Schltr.) Luer 2004
- Pleurothallis modesta (Brazil - Rio de Janeiro) - now synonym of Specklinia modesta (Barb.Rodr.) Luer 2004
- Pleurothallis modestissima (Brazil - Minas Gerais).
- Pleurothallis molleturoi (Ecuador) - now synonym of Crocodeilanthe molleturoi (Luer & Dodson) Luer 2004
- Pleurothallis monocardia (Venezuela to Ecuador).
- Pleurothallis montana (Brazil - Minas Gerais).
- Pleurothallis montezumae (Costa Rica) - now synonym of Specklinia montezumae (Luer) Luer 2004
- Pleurothallis montipelladensis Hoehne (Brazil - São Paulo) - now synonym of Specklinia montepelladensis (Hoehne) Luer 2004
- Pleurothallis morenoi (Bolivia) - now synonym of Specklinia morenoi (Luer) Luer 2004
- Pleurothallis morganii (Ecuador) - now synonym of Specklinia morganii (Luer) Luer 2004
- Pleurothallis morilloi (Venezuela) - now synonym of Acianthera morilloi (Carnevali & I.Ramírez) Luer 2004
- Pleurothallis moritzii (Venezuela to Guyana, Ecuador) - now synonym of Crocodeilanthe moritzii (Rchb.f.) Luer 2004
- Pleurothallis mornicola (Haiti) - now synonym of Specklinia mornicola (Mansf.) Luer 2004
- Pleurothallis moronae (SE. Ecuador) - now synonym of Acianthera moronae (Luer & Hirtz) Luer 2004
- Pleurothallis mouraei (SE. Brazil)
- Pleurothallis mucronata Lindl. ex Cogn (Cuba) - now synonym of Specklinia mucronata (Lindl. ex Cogn.) Luer 2004
- Pleurothallis mundula (Colombia).
- Pleurothallis murex (E. Cuba to Hispaniola) - now synonym of Specklinia murex (Rchb.f.) Luer 2004
- Pleurothallis murexoidea (S. Brazil) - now synonym of Specklinia murexoidea (Pabst) Luer 2004
- Pleurothallis muricaudata (Ecuador) - now synonym of Specklinia muricaudata (Luer) Luer 2004
- Pleurothallis muriculata (SE. Ecuador).
- Pleurothallis muscicola (E. Brazil).
- Pleurothallis muscoidea (Brazil - Rio de Janeiro).
- Pleurothallis muscosa (SE. Brazil to Argentina) - now synonym of Specklinia muscosa (Barb.Rodr.) Luer 2004
- Pleurothallis myrmecophila (Brazil - Mato Grosso).
- Pleurothallis myrticola (Brazil - Minas Gerais) - now synonym of Specklinia myrticola (Barb.Rodr.) Luer 2004
- Pleurothallis mystax (Panama).
- Pleurothallis nanifolia (SE. Venezuela) - now synonym of Specklinia nanifolia (Foldats) Luer 2004
- Pleurothallis napintzae (Ecuador) -now synonym of Specklinia napintzae (Luer & Hirtz) Luer 2004
- Pleurothallis nasiterna (Ecuador).
- Pleurothallis navilinguis (Colombia).
- Pleurothallis nectarifera ((Brazil - Rio de Janeiro) - now a synonym of Specklinia nectarifera (Barb.Rodr.) Luer 2004
- Pleurothallis nellyae (Colombia).
- Pleurothallis nemorosa (Brazil - Minas Gerais) - now synonym of Acianthera nemorosa (Barb.Rodr.) Luer 2004
- Pleurothallis nemorum (Costa Rica).
- Pleurothallis neobradei (Brazil - São Paulo) - now a synonym of Specklinia neobradei (Luer) Luer 2004
- Pleurothallis neoharlingii (Ecuador)
- Pleurothallis nephroglossa (E. Ecuador).
- Pleurothallis niesseniae (Colombia) - now synonym of Specklinia niesseniae (Luer) Luer 2004
- Pleurothallis nigriflora (Mexico - Morelos) - now synonym of Specklinia nigriflora (L.O.Williams) Luer 2004
- Pleurothallis nipterophylla (Ecuador).
- Pleurothallis nitida (Panama).
- Pleurothallis nivalis (WC. Ecuador) - now synonym of Crocodeilanthe nivalis (Luer) Luer 2004
- Pleurothallis niveoglobula (EC. & SE. Ecuador) - now synonym of Ancipitia niveoglobula (Luer) Luer 2004
- Pleurothallis northenae (Colombia).
- Pleurothallis nossax (Colombia).
- Pleurothallis notabilis (Colombia).
- Pleurothallis nox-media (Colombia).
- Pleurothallis nuda (W. South America to Venezuela).
- Pleurothallis nummularia (Cuba) - now synonym of Specklinia nummularia (Rchb.f.) Luer 2004
- Pleurothallis nutans (Colombia)
- Pleurothallis oblanceolata - now synonym of Specklinia oblanceolata (L.O.Williams) Luer 2004
- Pleurothallis obliquipetala - now synonym of Specklinia obliquipetala (Acuña & C.Schweinf.) Luer 2004
- Pleurothallis oblonga (Ecuador) - now synonym of Specklinia oblonga (Luer & Hirtz) Luer 2004
- Pleurothallis oblongifolia : Ladies' Bonnet Orchid (Caribbean) - now synonym of Dracontia oblongifolia (Lindl.) Luer 2004
- Pleurothallis obovata : South American Bonnet Orchid (Trop. America).
- Pleurothallis obpyriformis (Ecuador).
- Pleurothallis obscura (Mexico)
- Pleurothallis ocellus (SC. Ecuador).
- Pleurothallis ochreata (E. Brazil).
- Pleurothallis ochreata subsp. cylindrifolia (Brazil - Minas Gerais).
- Pleurothallis ochreata subsp. ochreata (NE. Brazi).
- Pleurothallis octavioi (Colombia).
- Pleurothallis octophrys (SE. Brazil) - now synonym of Specklinia octophrys (Rchb.f.) Luer 2004
- Pleurothallis odobeniceps (Colombia) - now synonym of Ancipitia odobeniceps (Luer) Luer 2004
- Pleurothallis odontotepala (Caribbean) - now synonym ofAcianthera odontotepala (Rchb.f.) Luer 2004
- Pleurothallis oestlundiana (Mexico)
- Pleurothallis ofella (Ecuador).
- Pleurothallis oligantha (Brazil - Rio de Janeiro) - now synonym of Acianthera oligantha (Barb.Rodr.) Luer 2004
- Pleurothallis omissa (Venezuela).
- Pleurothallis omoglossa (French Guiana, E. Ecuador).
- Pleurothallis onagriceps (Ecuador) - now synonym ofe Ancipitia onagriceps (Luer & Hirtz) Luer 2004
- Pleurothallis oncoglossa (Costa Rica).
- Pleurothallis ophiantha (Brazil - Minas Gerais).
- Pleurothallis orecta (Colombia).
- Pleurothallis orectopus (NW. Ecuador) -now synonym of Crocodeilanthe orectopus (Luer) Luer 2004
- Pleurothallis oricola (Cuba).
- Pleurothallis ornata (Mexico to C. America) - now synonym of Specklinia ornata (Rchb.f.) Luer 2004
- Pleurothallis ortegae (NE. Ecuador).
- Pleurothallis orthostachys Luer & R. Escobar (Colombia to Ecuador)
- Pleurothallis oscitans (Honduras) - now synonym of Didactylus oscitans (Ames) Luer 2004
- Pleurothallis otopetalum (S. Colombia to Peru) - now synonym of Kraenzlinella otopetalum (Schltr.) Luer 2004
- Pleurothallis oxapampae (Peru).
- Pleurothallis pabstii (Brazil - Paraná) - now synonym of Specklinia pabstii (Garay) Luer 2004
- Pleurothallis pacayana (C. America).
- Pleurothallis pachyglossa (Mexico to C. America) - now synonym of Dracontia pachyglossa (Lindl.) Luer 2004
- Pleurothallis pachyphylla (Brazil - Rio de Janeiro).
- Pleurothallis pachyphyta (Ecuador) - now synonym of Specklinia pachyphyta (Luer) Luer 2004
- Pleurothallis pachypus (W. South America) - now synonym of Crocodeilanthe pachypus (F.Lehm. & Kraenzl.) Luer 2004
- Pleurothallis pallida (Panama).
- Pleurothallis palliolata (Costa Rica).
- Pleurothallis pan (Costa Rica to Panama) - now synonym of Brenesia pan (Luer) Luer 2004
- Pleurothallis pandurata (Ecuador).
- Pleurothallis pandurifera (Brazil - Rio de Janeiro) - now synonym of Specklinia pandurifera (Lindl.) Luer 2004
- Pleurothallis panduripetala (S. Brazil).
- Pleurothallis pansamalae (S. Mexico to C. America).
- Pleurothallis pantasmi (C. America to W. Ecuador).
- Pleurothallis pantasmoides (Ecuador to Peru).
- Pleurothallis pantherina (Brazil - Rio de Janeiro) - now synonym of Specklinia pantherina (Seehawer) Luer 2004
- Pleurothallis papillifera (Costa Rica) - now synonym of Dracontia papillifera (Rolfe) Luer 2004
- Pleurothallis papillosa (Brazil - Minas Gerais).
- Pleurothallis papulifolia (Cuba) - now synonym of Acianthera papulifolia (Luer) Luer 2004
- Pleurothallis papuligera (Bolivia) - now synonym of Specklinia papuligera (Schltr.) Luer 2004
- Pleurothallis paquishae (Colombia to Ecuador).
- Pleurothallis paradoxa (Ecuador) - now synonym of Didactylus paradoxa (Luer & Dalström) Luer 2004
- Pleurothallis parahybunensis ((Brazil - Minas Gerais).
- Pleurothallis paranaensis (Brazil - Paraná) - now synonym of Specklinia paranaensis (Schltr.) Luer 2004
- Pleurothallis paranapiacabensis (Brazil - São Paulo) - now synonym of Specklinia paranapiacabensis (Hoehne) Luer 2004
- Pleurothallis pardipes (Brazil - Rio de Janeiro).
- Pleurothallis pariaensis (Venezuela).
- Pleurothallis parva (SE. Brazil).
- Pleurothallis parviflora (NE. Ecuador).
- Pleurothallis parvifolia (Costa Rica to S. Trop. America).
- Pleurothallis parvula - now synonym of Antilla parvula (Ames & C.Schweinf.) Luer 2004
- Pleurothallis paspaliformis (S. Brazil).
- Pleurothallis patateensis (Ecuador) - now synonym of Crocodeilanthe patateensis (Luer) Luer 2004
- Pleurothallis pauloensis (Brazil - São Paulo) - now synonym of Specklinia pauloensis (Hoehne & Schltr.) Luer 2004
- Pleurothallis pavimentata (Brazil- (Rio de Janeiro)).
- Pleurothallis pectinata (SE. Brazil).
- Pleurothallis peculiaris (Panama).
- Pleurothallis pelex (Ecuador).
- Pleurothallis pelicophora (Ecuador).
- Pleurothallis pellifeloidis (Brazil - Rio de Janeiro) - now synonym of Specklinia pellifeloidis (Barb.Rodr.) Luer 2004
- Pleurothallis pellucida (Ecuador) - now synonym of Crocodeilanthe pellucida (Luer & Hirtz) Luer 2004
- Pleurothallis pemonum (Venezuela) - now synonym of Specklinia pemonum (Carnevali & I.Ramírez) Luer 2004
- Pleurothallis pendens (Dominican Rep.) - now synonym of Antilla pendens (Dod) Luer 2004
- Pleurothallis penduliflora (Colombia to C. Peru).
- Pleurothallis penelops (Ecuador).
- Pleurothallis penicillata (Colombia) - now synonym of Colombiana penicillata (Luer) Luer 2004
- Pleurothallis pennelliana (Colombia) - now synonym of Crocodeilanthe pennelliana (Luer) Luer 2004
- Pleurothallis peperomioides (Costa Rica) - now synonym of Specklinia peperomioides (Ames) Luer 2004
- Pleurothallis per-dusenii (Brazil - Paraná).
- Pleurothallis perangusta (NE. Ecuador).
- Pleurothallis perennis (Costa Rica) - now synonym of Dracontia perennis (Luer) Luer 2004
- Pleurothallis perforata (Ecuador) .
- Pleurothallis perijaensis (Venezuela to Ecuador).
- Pleurothallis pernambucensis (NE. Brazil).
- Pleurothallis peroniocephala (E. Ecuador).
- Pleurothallis peroupavae (Brazil - São Paulo) - now synonym of Specklinia peroupavae (Hoehne & Brade) Luer 2004
- Pleurothallis perryi (W. Ecuador).
- Pleurothallis petersiana (Brazil) - now synonym of Specklinia petersiana (Schltr.) Luer 2004
- Pleurothallis petiolaris (Colombia) - now synonym of Specklinia petiolaris (Luer) Luer 2004
- Pleurothallis petropolitana (Brazil - Rio de Janeiro) - now synonym of Specklinia petropolitana (Hoehne) Luer 2004
- Pleurothallis pfisteri (Brazil).
- Pleurothallis phalangifera (W. South America to NW. Venezuela).
- Pleurothallis phoenicoptera (Venezuela) - now synonym of Acianthera phoenicoptera (Carnevali & G.A.Romero) Luer 2004
- Pleurothallis phoxophylla (Peru).
- Pleurothallis phratria (Ecuador).
- Pleurothallis phrynoglossa (Ecuador) - now synonym of Kraenzlinella phrynoglossa (Luer & Hirtz) Luer 2004
- Pleurothallis phyllocardia (Costa Rica to Panama).
- Pleurothallis phyllocardioides (Costa Rica to Bolivia).
- Pleurothallis phymatodea (Ecuador).
- Pleurothallis picta (Mexico to Trop. America).
- Pleurothallis pidax - now synonym of Specklinia pidax (Luer) Luer 2004
- Pleurothallis pileata (Colombia) .
- Pleurothallis pilifera (NW. Ecuador) - now synonym of Crocodeilanthe pilifera (Lindl.) Luer 2004
- Pleurothallis pilostoma (Costa Rica) - now synonym of Unciferia pilostoma (Luer) Luer 2004
- Pleurothallis piraquarensis (Brazil - Paraná) - now synonym of Specklinia piraquarensis (Hoehne) Luer 2004
- Pleurothallis piratiningana - now synonym of Specklinia piratiningana (Hoehne) Luer 2004
- Pleurothallis piresiana (Brazil - São Paulo).
- Pleurothallis pisinna (Guatemala) - now synonym of Specklinia pisinna (Luer) Luer 2004
- Pleurothallis platypetala (Colombia).
- Pleurothallis platysepala (Colombia).
- Pleurothallis platystylis (Mexico to C. America) - now synonym of Specklinia platystylis (Schltr.) Luer 2004
- Pleurothallis pleurothalloides (Brazil - São Paulo) - now synonym of Specklinia pleurothalloides (Cogn.) Luer 2004
- Pleurothallis poculifera (Colombia).
- Pleurothallis podoglossa - now synonym of Specklinia podoglossa (Hoehne) Luer 2004
- Pleurothallis polygonoides (Trinidad to C. & S. Trop. America) - now synonym of Specklinia polygonoides (Griseb.) Luer 2004
- Pleurothallis polysticta (Panama).
- Pleurothallis pompalis (Costa Rica) - now synonym of Unciferia pompalis (Ames) Luer 2004
- Pleurothallis popayanensis (Colombia) - now synonym of Crocodeilanthe popayanensis (F.Lehm. & Kraenzl.) Luer 2004
- Pleurothallis portillae (S. Ecuador).
- Pleurothallis portilloi (Colombia) - now synonym of Apoda-prorepentia portilloi (Luer & R.Escobar) Luer 2004
- Pleurothallis possoae (Colombia) - now synonym of Crocodeilanthe possoae (Luer) Luer 2004
- Pleurothallis powellii (Costa Rica to Panam) - now synonym of Dracontia powellii (Schltr.) Luer 2004
- Pleurothallis praealta (Ecuador) - now synonym of Crocodeilanthe praealta (Luer & Hirtz) Luer 2004
- Pleurothallis praecipua (E. Ecuador) - now synonym of Ancipitia praecipua (Luer) Luer 2004
- Pleurothallis praemorsa (Ecuador) - now synonym of Specklinia praemorsa (Luer) Luer 2004
- Pleurothallis pristeoglossa (Brazil - Minas Gerais) - now synonym of Specklinia pristeoglossa (Rchb.f. & Warm.) Luer 2004
- Pleurothallis privigna (Ecuador) - now synonym of Antilla privigna (Luer) Luer 2004
- Pleurothallis producta (Ecuador).
- Pleurothallis prognatha (Colombia).
- Pleurothallis prolaticollaris (NC. Ecuador).
- Pleurothallis prolifera (SE. Venezuela, Bolivia, SE. Brazil).
- Pleurothallis prolificans (Ecuador) - now synonym of Crocodeilanthe prolificans (Luer & Hirtz) Luer 2004
- Pleurothallis prolixa (Ecuador) - now synonym of Specklinia prolixa (Luer & Hirtz) Luer 2004
- Pleurothallis prostrata (Cuba) - now synonym of Antilla prostrata (Lindl.) Luer 2004
- Pleurothallis pruinosa : Waxy Bonnet Orchid (Trop. America).
- Pleurothallis pseudocheila (Colombia) - now synonym of Specklinia pseudocheila (Luer & R.Escobar) Luer 2004
- Pleurothallis pseudopogon (Ecuador) .
- Pleurothallis psichion (Costa Rica) - now synonym of Specklinia psichion (Luer) Luer 2004
- Pleurothallis psilantha (Costa Rica) - now synonym of Unciferia psilantha (Luer) Luer 2004
- Pleurothallis ptychophora (Ecuador)
- Pleurothallis pubescens : Hairy Bonnet Orchid (Mexico to Trop. America).
- Pleurothallis pubipetala (Brazil - Rio de Janeiro) - now synonym of Specklinia pubipetala (Hoehne) Luer 2004
- Pleurothallis pulchella (Costa Rica to Peru) - now synonym of Crocodeilanthe pulchella (Kunth) Luer 2004
- Pleurothallis pulcherrima (Ecuador).
- Pleurothallis pulvinaris (Colombia).
- Pleurothallis punctatiflora (Brazil - Rio de Janeiro).
- Pleurothallis punctulata (Colombia to NW. Venezuela) - now synonym of Talpinaria punctulata (Rolfe) Luer 2004
- Pleurothallis punicea (Ecuador) .
- Pleurothallis purdomae (Panama).
- Pleurothallis purpurascens (Ecuador) .
- Pleurothallis purpurella (Colombia).
- Pleurothallis purpureoviolacea (Brazil - São Paulo) - now synonym of Specklinia purpureoviolacea (Cogn.) Luer 2004
- Pleurothallis puttemansii (Brazil - São Paulo) - now synonym of Specklinia puttemansii (Hoehne) Luer 2004
- Pleurothallis quadricaudata (W. Colombia to NW. Ecuador).
- Pleurothallis quadricristata now synonym of Acianthera quadricristata (Luer & Hirtz) Luer 2004
- Pleurothallis quadrifida (Caribbean, Mexico to Venezuela).
- Pleurothallis quadriserrata (Ecuador).
- Pleurothallis quaternaria (Colombia).
- Pleurothallis questionis (Colombia).
- Pleurothallis quinqueseta - now synonym of Specklinia quinquesta (Ames) Luer 2004
- Pleurothallis quisqueyana (Dominican Rep.) - now synonym of Antilla quisqueyana (Dod) Luer 2004
- Pleurothallis rabei - now synonym of Specklinia rabei (Foldats) Luer 2004
- Pleurothallis radialis (Brazil - Rio de Janeiro) - now synonym of Specklinia radialis (Porto & Brade) Luer 2004
- Pleurothallis radula (Costa Rica).
- Pleurothallis raduliglossa (Brazil - Paraná).
- Pleurothallis ramificans (Colombia to Ecuador).
- Pleurothallis ramonensis (Costa Rica) - now synonym of Dracontia ramonensis (Schltr.) Luer 2004
- Pleurothallis ramosa (Brazil to Ecuador)- now synonym of Acianthera ramosa (Barb.Rodr.) Luer 2004
- Pleurothallis ramosii (Colombia).
- Pleurothallis ramphastorhyncha (Brazil- (Rio de Janeiro)).
- Pleurothallis ramulosa (Ecuador) - now synonym of Specklinia ramulosa (Lindl.) Luer 2004
- Pleurothallis recula (Costa Rica to Ecuador) - now synonym of Specklinia recula (Luer) Luer 2004
- Pleurothallis recurva (Bolivia to S. Brazil).
- Pleurothallis recurvata (SE. Ecuador).
- Pleurothallis recurvipetala (Brazil - Rio de Janeiro)
- Pleurothallis reedii - now synonym of Specklinia reedii (Luer) Luer 2004
- Pleurothallis regalis (Ecuador) - now synonym of Specklinia regalis (Luer) Luer 2004
- Pleurothallis reginae (Colombia).
- Pleurothallis reptans (Ecuador).
- Pleurothallis reptilis (Ecuador) - now synonym of Specklinia reptilis (Luer & Dalström) Luer 2004
- Pleurothallis restrepioides (Ecuador to N. Peru) - now synonym of Elongatia restrepioides (Lindl.) Luer 2004
- Pleurothallis resupinata (SW. Mexico) - now synonym of Specklinia resupinata (Ames) Luer 2004
- Pleurothallis retusa (C. & SW. Mexico).
- Pleurothallis retusiloba (Peru) - now synonym of Crocodeilanthe retusiloba (C.Schweinf.) Luer 2004
- Pleurothallis revoluta (Trinidad to S. Trop. America).
- Pleurothallis rhabdosepala (Brazil to Argentina) .
- Pleurothallis rhaphidopus (Colombia).
- Pleurothallis rhodotantha (W. South America) - now synonym of Crocodeilanthe rhodotantha (Rchb.f.) Luer 2004
- Pleurothallis ricii (Bolivia) - now synonym of Specklinia ricii (Luer & R.Vásquez) Luer 2004
- Pleurothallis rictoria (Colombia) - now synonym of Crocodeilanthe rictoria (Rchb.f.) Luer 2004
- Pleurothallis rigidula (SE. Brazil) - now synonym of Specklinia rigidula (Cogn.) Luer 2004
- Pleurothallis ripleyi (Ecuador).
- Pleurothallis robertoi - now synonym of Specklinia robertoi (Luer & Toscano) Luer 2004
- Pleurothallis rodrigoi - now synonym of Acianthera rodrigoi (Luer) Luer 2004
- Pleurothallis rodriguesii (SE. Brazil).
- Pleurothallis roseola (NE. Ecuador).
- Pleurothallis rostellata (Brazil - Minas Gerais) - now synonym of Acianthera rostellata (Barb.Rodr.) Luer 2004
- Pleurothallis rostratissima (Ecuador) - now synonym of Specklinia rostratissima (Luer & J.Portilla) Luer 2004
- Pleurothallis rotundifolia (Jamaica).
- Pleurothallis rowleei (Costa Rica to W. Ecuador).
- Pleurothallis rubella (Panama to Colombia) - now synonym of Rubellia rubella (Luer) Luer 2004
- Pleurothallis rubens (W. South America to Brazil) - now synonym of Specklinia rubens (Lindl.) Luer 2004
- Pleurothallis ruberrima (W. South America to NW. & N. Venezuela).
- Pleurothallis rubroinversa (Ecuador) .
- Pleurothallis rubrolimbata (Brazil) - now synonym of Specklinia rubrolimbata (Hoehne) Luer 2004
- Pleurothallis rubroviridis (Cuba, Venezuela to Peru).
- Pleurothallis rudolfii (Brazil - São Paulo) - now synonym of Specklinia rudolfii (Pabst) Luer 2004
- Pleurothallis rugosa (Colombia).
- Pleurothallis rusbyi (Bolivia).
- Pleurothallis ruscaria (S. Colombia to N. Ecuador) - now synonym of Colombiana ruscaria (Luer) Luer 2004
- Pleurothallis ruschii - now synonym of Specklinia ruschii (Hoehne) Luer 2004
- Pleurothallis ruscifolia : Green Bonnet Orchid (Trop. America).
- Pleurothallis saccatilabia (Mexico - Chiapas).
- Pleurothallis sagittilabia (Colombia).
- Pleurothallis salpingantha (W. South America to Venezuela) - now synonym of Crocodeilanthe salpingantha (Luer & Hirtz) Luer 2004
- Pleurothallis saltatoria (Ecuador to Bolivia).
- Pleurothallis samacensis (C. America to E. Ecuador).
- Pleurothallis sanchezii - now synonym of Specklinia sanchezii (Luer & Hirtz) Luer 2004
- Pleurothallis sanctae-rosa (Colombia).
- Pleurothallis sandaliorum (Venezuela) - now synonym of Acianthera sandaliorum (G.A.Romero & Carnevali) Luer 2004
- Pleurothallis sandemanii (Colombia) - now synonym of Talpinaria sandemanii (Luer) Luer 2004
- Pleurothallis sanjanae (Bolivia) .
- Pleurothallis sanluisii (NW. Venezuela).
- Pleurothallis sannio (Colombia).
- Pleurothallis sarcopetala (Brazil - Rio de Janeiro).
- Pleurothallis sarcophylla (N. Venezuela).
- Pleurothallis sarcosepala (Venezuela).
- Pleurothallis sarracenia (Brazil - Minas Gerais).
- Pleurothallis saundersiana (Brazil to Bolivia).
- Pleurothallis saurocephala (Brazil - Minas Gerais).
- Pleurothallis scaberula (Bolivia) .
- Pleurothallis scabrata (S. Ecuador to Bolivia) - now synonym of Specklinia scabrata (Lindl.) Luer 2004
- Pleurothallis scabrilinguis (Colombia to Peru).
- Pleurothallis scabripes - now synonym of Specklinia scabripes (Lindl.) Luer 2004
- Pleurothallis scalpricaulis (Ecuador to Bolivia).
- Pleurothallis scansor (Colombia to Ecuador) - now synonym of Crocodeilanthe scansor (Luer) Luer 2004
- Pleurothallis scaphipetala (Costa Rica).
- Pleurothallis scariosa (C. & SW. Mexico) - now synonym of Specklinia scariosa (La Llave & Lex.) Luer 2004
- Pleurothallis schaferi - now synonym of Specklinia schaferi (Ames) Luer 2004
- Pleurothallis schlimii (Colombia) - now synonym of Specklinia schlimii (Luer) Luer 2004
- Pleurothallis schudelii - now synonym of Specklinia schudelii (Luer & Hirtz) Luer 2004
- Pleurothallis schweinfurthii (Peru to Bolivia).
- Pleurothallis scintillata (Ecuador).
- Pleurothallis scitula (Costa Rica to Panama).
- Pleurothallis sclerophylla (Mexico - Chiapas to S. Trop. America) - now synonym of Specklinia sclerophylla (Lindl.) Luer 2004
- Pleurothallis scolopax (Colombia).
- Pleurothallis scoparum (Ecuador) - now synonym of Colombiana scoparum (Rchb.f.) Luer 2004
- Pleurothallis sculptilis (Ecuador) .
- Pleurothallis scurrula (Peru).
- Pleurothallis secunda (S. Trop. America).
- Pleurothallis segoviensis : Trout-fly Orchid (SE. Mexico to Ecuador) - now synonym of Unciferia segoviensis (Rchb.f.) Luer 2004
- Pleurothallis segregatifolia (Mexico to C. America) - now synonym of Specklinia segregatifolia (Ames & C.Schweinf.) Luer 2004
- Pleurothallis semperflorens (N. South America to Ecuador).
- Pleurothallis sempergemmata (Costa Rica to Panama) - now synonym of Brenesia sempergemmata (Luer) Luer 2004
- Pleurothallis seriata (N. South America to Brazil).
- Pleurothallis serpens (Colombia).
- Pleurothallis serpentula (Brazil - Minas Gerais).
- Pleurothallis serricardia (Colombia).
- Pleurothallis serrisepala (Bolivia) .
- Pleurothallis serrulata (Brazil - Minas Gerais).
- Pleurothallis serrulatipetala (Brazil - Minas Gerais).
- Pleurothallis sertularioides (Mexico to Bolivia, Caribbean) - now synonym of Specklinia sertularioides (Sw.) Luer 2004
- Pleurothallis setosa (S. Mexico to C. America).
- Pleurothallis sextonii (Colombia).
- Pleurothallis shaferi (Cuba).
- Pleurothallis shuarii (SE. Ecuador) - now synonym of Kraenzlinella shuarii (Luer) Luer 2004
- Pleurothallis sibatensis (Colombia) -now synonym of Specklinia sibatensis (F.Lehm. & Kraenzl.) Luer 2004
- Pleurothallis sicaria (Trinidad to C. & S. Trop. America).
- Pleurothallis sicariopsis (Ecuador to Bolivia).
- Pleurothallis sicula (Ecuador to Bolivia) - now synonym of Acianthera sicula (Luer & R.Vásquez) Luer 2004
- Pleurothallis sigmoidea (Costa Rica) - now synonym of Kraenzlinella sigmoidea (Ames & C.Schweinf.) Luer 2004
- Pleurothallis sigynes (Ecuador) .
- Pleurothallis sijmii (Peru) - now synonym of Elongatia sijmii (Luer) Luer 2004
- Pleurothallis silvae - now synonym of Acianthera silvae (Luer & Toscano) Luer 2004
- Pleurothallis silverstonei (Colombia).
- Pleurothallis simacoana (Bolivia) .
- Pleurothallis similis (S. Brazil to Argentina)
- Pleurothallis simmleriana (C. America) - now synonym of Specklinia simmleriana (Rendle) Luer 2004
- Pleurothallis simplex (Costa Rica).
- Pleurothallis simpliciflora (Dominican Rep.) - now synonym of Specklinia simpliciflora (Dod) Luer 2004
- Pleurothallis simpliciglossa (S. Brazil) -now synonym of Specklinia simpliciglossa (Loefgr.) Luer 2004
- Pleurothallis simplicilabia (Venezuela) - now synonym of Crocodeilanthe simplicilabia (C.Schweinf.) Luer 2004
- Pleurothallis simulans (Panama).
- Pleurothallis simulatrix (Ecuador).
- Pleurothallis siphoglossa (Colombia to Venezuela).
- Pleurothallis siphonantha (Ecuador to Peru) - now synonym of Crocodeilanthe siphonantha (Luer) Luer 2004
- Pleurothallis sirene (Colombia to NW. Venezuela) - now synonym of Lindleyalis sirene (Rchb.f.) Luer 2004
- Pleurothallis smaragdina (Ecuador) - now synonym of Kraenzlinella smaragdina (Luer) Luer 2004 or Specklinia smaragdina (Luer) Luer 2004 (?)
- Pleurothallis sobrina (Ecuador) .
- Pleurothallis solium (Ecuador) - now synonym of Ancipitia solium (Luer) Luer 2004
- Pleurothallis somnolenta (Colombia).
- Pleurothallis sonderanoides (Brazil -São Paulo).
- Pleurothallis sonderiana (SE. & S. Brazil to Argentina) .
- Pleurothallis soratana (Bolivia) - now synonym of Specklinia soratana (Rchb.f.) Luer 2004
- Pleurothallis sordida - now synonym of Specklinia sordida (Kraenzl.) Luer 2004
- Pleurothallis sororcula (Brazil - São Paulo) - now synonym of Specklinia sororcula (Schltr.) Luer 2004
- Pleurothallis spannageliana (Brazil - Rio de Janeiro) - now synonym of Specklinia spannageliana (Hoehne) Luer 2004
- Pleurothallis sparsiflora (Brazil (Rio Grande do Sul)) - now synonym of Specklinia sparsiflora (Schltr.) Luer 2004
- Pleurothallis spathilabia (Colombia to W. Ecuador) - now synonym of Specklinia spathilabia (Schltr.) Luer 2004
- Pleurothallis spathosa (Colombia) - now synonym of Crocodeilanthe spathosa (Luer & R.Escobar) Luer 2004
- Pleurothallis spathulifolia (Peru) - now synonym of Specklinia spathulifolia (C.Schweinf.) Luer 2004
- Pleurothallis spathuliformis (Bolivia) - now synonym of Specklinia spathuliformis (Luer & R.Vásquez) Luer 2004
- Pleurothallis spathuliglossa - now synonym of Specklinia spathuliglossa (Hoehne) Luer 2004
- Pleurothallis spathulipetala (Colombia) - now synonym of Ancipitia spathulipetala (Luer) Luer 2004
- Pleurothallis spectrilinguis (C. America) - now synonym of Specklinia spectrilinguis (Rchb.f.) Luer 2004
- Pleurothallis sphaerantha (Ecuador).
- Pleurothallis sphaeroglossa (Brazil - Paraná).
- Pleurothallis spiculifera (Trinidad & Tobago to Brazil)
- Pleurothallis spiloporphyrea (Dominican Rep.) - now synonym of Specklinia spiloporphyrea (Dod) Luer 2004
- Pleurothallis sprucei - now synonym of Specklinia sprucei (Lindl.) Luer 2004
- Pleurothallis steinbuchiae (Venezuela) - now synonym of Specklinia steinbuchiae (Carnevali & G.A.Romero) Luer 2004
- Pleurothallis stelidilabia (S. Ecuador).
- Pleurothallis stelidiopsis (Ecuador) - now synonym of Crocodeilanthe stelidiopsis (Luer) Luer 2004
- Pleurothallis stenocardium (S. Venezuela to Guyana).
- Pleurothallis stenophylla (W. South America) - now synonym of Specklinia stenophylla (F.Lehm. & Kraenzl.) Luer 2004
- Pleurothallis stenosepala (W. South America to NW. Venezuela).
- Pleurothallis stenota (SC. Ecuador).
- Pleurothallis stergiosii (Venezuela)
- Pleurothallis stevensonii (Ecuador) .
- Pleurothallis steyermarkii (NW. Venezuela)
- Pleurothallis stictophylla - now synonym of Specklinia stictophylla (Schltr.) Luer 2004
- Pleurothallis stillsonii (Haiti) .
- Pleurothallis stonei (Costa Rica) - now synonym of Brenesia stonei (Luer) Luer 2004
- Pleurothallis striata - now synonym of Specklinia striata (H.Focke) Luer 2004
- Pleurothallis stricta (Colombia to Ecuador).
- Pleurothallis strobilifera (Colombia).
- Pleurothallis strupifolia (SE. Brazil).
- Pleurothallis stumpflei (S. Ecuador to Peru).
- Pleurothallis subcordifolia (Brazil - São Paulo).
- Pleurothallis subnulla - now synonym of Specklinia subnulla (Luer & Toscano) Luer 2004
- Pleurothallis subpicta - now synonym of Specklinia subpicta (Schltr.) Luer 2004
- Pleurothallis subreniformis (NW. Ecuador).
- Pleurothallis subrotundifolia (Brazil).
- Pleurothallis subsinuata (S. America) - now synonym of Specklinia subsinuata (Lindl.) Luer 2004
- Pleurothallis subtilis (NW. Venezuela).
- Pleurothallis subulifolia (Brazil)
- Pleurothallis succuba - now synonym of Specklinia succuba (Luer) Luer 2004
- Pleurothallis sugdenii (Colombia).
- Pleurothallis sulcata (Brazil)
- Pleurothallis sulphurea (Brazil - Rio de Janeiro) - now synonym of Specklinia sulphurea (Barb.Rodr.) Luer 2004
- Pleurothallis superbiens (Ecuador) - now synonym of Elongatia superbiens (Luer) Luer 2004
- Pleurothallis supervacanea (Colombia).
- Pleurothallis susanensis (Brazil) - now synonym of Specklinia susanensis (Hoehne) Luer 2004
- Pleurothallis suspensa (N. South America).
- Pleurothallis syringodes (Colombia) - now synonym of Specklinia syringodes (Luer) Luer 2004
- Pleurothallis tabacina (Brazil- (Rio de Janeiro)) - now synonym of Specklinia tabacina (Barb.Rodr.) Luer 2004
- Pleurothallis talpinaria (W. South America to Venezuela).
- Pleurothallis talpinarioides (Venezuela) - now synonym of Lindleyalis talpinarioides (Garay & Dunst.) Luer 2004
- Pleurothallis tamboensis (Colombia).
- Pleurothallis tanyrhina (Colombia).
- Pleurothallis taracuana (N. Brazil).
- Pleurothallis tarantula (Colombia to Ecuador) - now synonym of Specklinia tarantula (Luer & Hirtz) Luer 2004
- Pleurothallis taurus (Colombia to Ecuador).
- Pleurothallis taxis (Ecuador) - now synonym of Crocodeilanthe taxis (Luer) Luer 2005
- Pleurothallis teaguei (Ecuador) .
- Pleurothallis tectosa (Ecuador) .
- Pleurothallis telamon (Panama).
- Pleurothallis tempestalis (Ecuador) .
- Pleurothallis tenebrosa (Venezuela).
- Pleurothallis tentaculata (W. South America to Venezuela).
- Pleurothallis teresv (SE. Brazil) - now synonym of Acianthera teres (Lindl.) Luer 2004
- Pleurothallis teretifoliav (E. & S. Brazil to Argentina)
- Pleurothallis testifoliav (Caribbean, C. America to Venezuela).
- Pleurothallis tetrachaeta (Ecuador) .
- Pleurothallis tetragona (Colombia) - now synonym of Ancipitia tetragona (Luer & R.Escobar) Luer 2004
- Pleurothallis tetroxys (Colombia) - now synonym of Colombiana tetroxys (Luer) Luer 2004
- Pleurothallis thomasiae (Honduras) - now synonym of Specklinia thomasiae (Luer) Luer 2004
- Pleurothallis thymochila (Panama) - now synonym of Dracontia thymochila (Luer) Luer 2004
- Pleurothallis thysana (Ecuador) - now synonym of Didactylus thysana (Luer & J.Portilla) Luer 2004
- Pleurothallis tiarata Luer & Hirtz (Morona-Santiago, Ecuador)
- Pleurothallis tigridens (Brazil) - now synonym of Specklinia tigridens (Loefgr.) Luer 2004
- Pleurothallis tikalensis (NC. Mexico to Guatemala).
- Pleurothallis tintinnabula (Costa Rica) - now synonym of Dracontia tintinnabula (Luer) Luer 2004
- Pleurothallis tipuloides (Ecuador)
- Pleurothallis titan (Panama).
- Pleurothallis toachica (Ecuador) - now synonym of Acianthera toachica (Luer & Dodson) Luer 2004
- Pleurothallis tokachii (Peru) - now synonym of Acianthera tokachii (Luer) Luer 2004
- Pleurothallis tomentosa (Costa Rica) - now synonym of Brenesia tomentosa (Luer) Luer 2004
- Pleurothallis tonduzii (Costa Rica).
- Pleurothallis torrana (Colombia).
- Pleurothallis tortilis (Colombia to N. Ecuador) - now synonym of Specklinia tortilis (Luer & R.Escobar) Luer 2004
- Pleurothallis trachysepala (SW. Ecuador to N. Peru).
- Pleurothallis tragulosa (Ecuador) .
- Pleurothallis translucida (Brazil -Rio de Janeiro) - now synonym of Acianthera translucida (Barb.Rodr.) Luer 2004
- Pleurothallis transparens (Brazil - São Paulo) - now synonym of Specklinia transparens (Schltr.) Luer 2004
- Pleurothallis transversilabia (Venezuela).
- Pleurothallis tribuloides (Mexico to C. America, Caribbean)
- Pleurothallis tricarinata (S. Ecuador to NW. Bolivia).
- Pleurothallis trichophora (Cuba to Hispaniola) - now synonym of Antilla trichophora (Lindl.) Luer 2004
- Pleurothallis trichostoma (Ecuador) - now synonym of Specklinia trichostoma (Luer) Luer 2004
- Pleurothallis trichyphis (W. Cuba) - now synonym of Specklinia trichyphis (Rchb.f.) Luer 2004
- Pleurothallis tricolor (Brazil - Minas Gerais).
- Pleurothallis tridentata (N. & W. South America).
- Pleurothallis trifida (Brazil - Rio de Janeiro) - now synonym of Specklinia trifida (Lindl.) Luer 2004
- Pleurothallis trifurcata (SE. Ecuado).
- Pleurothallis trimeropetala (Brazil - Rio de Janeiro) - now synonym of Specklinia trimeropetala (Pabst) Luer 2004
- Pleurothallis tripterantha (C. America to Argentina) - now synonym of Specklinia tripterantha (Rchb.f.) Luer 2004
- Pleurothallis tripterocarpa (Bolivia) .
- Pleurothallis tristis (Brazil - Paraná).
- Pleurothallis troglodytes (Ecuador).
- Pleurothallis trulla (Peru) - now synonym of Specklinia trulla (Rchb.f. & Warsz.) Luer 2004
- Pleurothallis trullifera (SE. Ecuador) - now synonym of Specklinia trullifera (Luer & Hirtz) Luer 2004
- Pleurothallis trullilabia (Brazil).
- Pleurothallis truncata (Ecuador).
- Pleurothallis truncicola (Brazil - Bahia).
- Pleurothallis tryssa (SW. Colombia to W. Ecuador).
- Pleurothallis tsubotae (Colombia) - now synonym of Specklinia tsubotae (Luer & R.Escobar) Luer 2004
- Pleurothallis tubata (Mexico to C. America).
- Pleurothallis tuberculosa (Ecuador).
- Pleurothallis tuerckheimii (Mexico - Chiapas to C. America) - now synonym of Dracontia tuerckheimii (Schltr.) Luer 2004
- Pleurothallis tunguraguae (W. South America) - now synonym of Crocodeilanthe tunguraguae (F.Lehm. & Kraenzl.) Luer 2004
- Pleurothallis turrialbae (Costa Rica) - now synonym of Specklinia turrialbae (Luer) Luer 2004
- Pleurothallis tuzae (Colombia).
- Pleurothallis tyria (Ecuador) .
- Pleurothallis umbrosa (Brazil - Minas Gerais).
- Pleurothallis uncinata (C. America to Venezuela, Jamaica) - now synonym of Brenesia uncinata (Fawc.) Luer 2004
- Pleurothallis unduavica (Bolivia) -now synonym of Specklinia unduavica (Luer & R.Vásquez) Luer 2004
- Pleurothallis undulata (S. Trop. America).
- Pleurothallis unguicallosa (Mexico - Revillagigedo Is. - Socorro).
- Pleurothallis unguiculata (Brazil - São Paulo).
- Pleurothallis uniflora (N. South America to Brazil).
- Pleurothallis uninervia (Ecuador).
- Pleurothallis urceolata (Ecuador).
- Pleurothallis ursula (Ecuador) - now synonym of Specklinia ursula (Luer & Hirtz) Luer 2004
- Pleurothallis uvifera (Colombia).
- Pleurothallis vaginata - now synonym of Specklinia vaginata (Schltr.) Luer, 2004
- Pleurothallis valladolidensis (Ecuador).
- Pleurothallis valvola (SE. Ecuador).
- Pleurothallis vargasii (Peru to Bolivia) - now synonym of Crocodeilanthe vargasii (C.Schweinf.) Luer 2004
- Pleurothallis variabilis (Ecuador).
- Pleurothallis variegata (Brazil - Minas Gerais) - now synonym of Specklinia variegata (Barb.Rodr.) Luer 2004
- Pleurothallis vasquezii (Bolivia) - now synonym of Specklinia vasquezii (Luer) Luer 2004
- Pleurothallis vegrandis (Ecuador) - now synonym of Crocodeilanthe vegrandis (Luer & Dodson) Luer 2004
- Pleurothallis velaticaulis (Costa Rica to Trinidad and W. South America) - now synonym of Crocodeilanthe velaticaulis (Rchb.f.) Luer 2004
- Pleurothallis veliformis (Ecuador).
- Pleurothallis vellozoana (Brazil - Rio Grande do Sul).
- Pleurothallis venulosa - now synonym of Acianthera venulosa (Luer & R.Vásquez) Luer 2004
- Pleurothallis verbiformis (S. Ecuador to N. Peru) - now synonym of Crocodeilanthe verbiformis (Luer) Luer 2004
- Pleurothallis verboonenii - now synonym of Specklinia verboonenii (Luer & Toscano) Luer 2004
- Pleurothallis verecunda (C. America to Ecuador).
- Pleurothallis verruculosa (Peru).
- Pleurothallis versicolor (Brazil).
- Pleurothallis vestigipetala (W. South America).
- Pleurothallis vestita (Brazil) - now synonym of Specklinia vestita (Kraenzl.) Luer 2004
- Pleurothallis viduata (Ecuador) - now synonym of Ancipitia viduata (Luer) Luer 2004
- Pleurothallis vieirae (Colombia).
- Pleurothallis vilipensa (C. America).
- Pleurothallis villosa (Mexico to C. America) - now synonym of Specklinia villosa (Knowles & Westc.) Luer 2004
- Pleurothallis villosilabia - now synonym of Specklinia villosilabia (Luer & Hirtz) Luer 2004
- Pleurothallis vinealis (Colombia).
- Pleurothallis violacea (Mexico - Veracruz to El Salvador).
- Pleurothallis violaceomaculata (Brazil - Paraná) - now synonym of Specklinia violaceomaculata (Hoehne) Luer 2004
- Pleurothallis virgata (Peru) - now synonym of Crocodeilanthe virgata (Luer) Luer 2004
- Pleurothallis viridiflora (Brazil - Rio de Janeiro).
- Pleurothallis viridis (Ecuador) - now synonym of Acianthera viridis (Luer & Hirtz) Luer 2004
- Pleurothallis vitellina (Brazil).
- Pleurothallis vitorinoi - now synonym of Specklinia vitorinoi (Luer & Toscano) Luer 2004
- Pleurothallis volans (Ecuador) .
- Pleurothallis volcanica (Costa Rica to Panama).
- Pleurothallis vorator (S. Ecuador, Bolivia) - now synonym of Ancipitia vorator (Luer & R.Vásquez) Luer 2004
- Pleurothallis wacketii (Brazil) - now synonym of Specklinia wacketii (Handro & Pabst) Luer 2004
- Pleurothallis wageneriana (Colombia to N. Venezuela).
- Pleurothallis wagneri (Costa Rica to Ecuador) - now synonym of Unciferia wagneri (Schltr.) Luer 2004
- Pleurothallis wanderbildtiana (Brazil)
- Pleurothallis wawraeana (Brazil - Rio de Janeiro).
- Pleurothallis weddelliana (Bolivia) - now synonym of Crocodeilanthe weddelliana (Rchb.f.) Luer 2004
- Pleurothallis welsii-windischii (Brazil - Bahia.
- Pleurothallis welteri (Brazil - Minas Gerais) - now synonym of Specklinia welteri (Pabst) Luer 2004
- Pleurothallis wigginsii (NC. Ecuador).
- Pleurothallis wrightii (Cuba) - now synonym of Specklinia wrightii (Rchb.f.) Luer 2004
- Pleurothallis wyvern (Colombia to Ecuador).
- Pleurothallis xanthella (NE. Ecuador).
- Pleurothallis xanthochlora (W. South America to NW. Venezuela).
- Pleurothallis xenion (Colombia) - now a synonym of Xenosia xenion (Luer & R.Escobar) Luer 2004
- Pleurothallis xerophila (Mexico - Chihuahua) - now synonym of Specklinia xerophila (Schltr.) Luer 2004
- Specklinia ximenae Luer
- Pleurothallis xiphizusa (Ecuador to Peru).
- Pleurothallis xylobiochila (Brazil - Paraná).
- Pleurothallis yauaperyensis (Trinidad to N. Brazil) - now synonym of Specklinia yauaperyensis (Barb.Rodr.) Luer 2004
- Pleurothallis ypirangae (Brazil - Paraná) - now synonym of Specklinia ypirangae (Kraenzl.) Luer 2004
- Pleurothallis yucatanensis (S. Mexico to C. America).
- Pleurothallis yupanki (Bolivia) - now synonym of Specklinia yupanki (Luer & R.Vásquez) Luer 2004
- Pleurothallis zarumae (Ecuador).
- Pleurothallis zephyrina - now synonym of Specklinia zephyrina (Rchb.f.) Luer 2004
- Pleurothallis zumbae - now synonym of Acianthera zumbae (Luer & Hirtz) Luer 2004
- Pleurothallis zunagensis (Ecuador) - now synonym of Crocodeilanthe zunagensis (Luer & Hirtz) Luer 2004
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