Thứ Tư, 17 tháng 4, 2013

Brassavola

Brassavola is a genus of 20 orchids (family Orchidaceae). They were named in 1813 by the Scottish botanist Robert Brown. The name comes from the Venetian nobleman and physician Antonio Musa Brassavola. This genus is abbreviated B. in trade journals.
These species are native to the lowlands of Central America and tropical South America. They are epiphytes, and a few are lithophytes. A single, apical and succulent leaf grows on an elongated pseudobulb.
The orchid yields a single white or greenish white flower, or a raceme of a few flowers. The three sepals and two lateral petals are greenish, narrow and long. The base of the broad, sometimes fringed lip partially enfolds the column. This column has a pair of falciform ears on each side of the front and contains twelve (sometimes eight) pollinia.
Most Brassavola orchids are very fragrant, attracting pollinators with their citrusy smell. But they are only fragrant at night, in order to attract the right moth. Longevity of flowers depends on the species and is between five and thirty days.
In 1698 Brassavola nodosa was the first tropical orchid to be brought from the Caribbean island Curaçao to Holland. Thus began the propagation of this orchid and the fascination for orchids in general.

Type species
B. cucullata
Species
See text.
Synonyms
Eudisanthema Neck. ex Post & Kuntze
Lysimnia Raf.
Tulexis Raf.
The species of Brassavola have been divided into four sections:[1]

B. sect. Brassavola

This monotypic section, erected by H. G. Jones in 1969, contains the type of the genus:

B. sect. Sessilabia

This section, erected by Rolfe in 1902, is characterized by narrow labella with fimbriate margins to wider labella with entire margins.

B. sect. Cuneilabia

This section, erected by Rolfe in 1902, is characterized by narrowly constricted labellum bases. The sectional type is B. nodosa

B. sect. Lateraliflorae

This section, erected by H.G.Jones in 1975, is characterized by laterally-borne inflorescences. The sectional type is B. acaulis
Brassavola is in the same alliance as the genera Cattleya and Laelia. They have been used extensively in hybridization and represent the B at the beginning of the names of such crosses. For example, Blc. is Brassolaeliacattleya.
 Brassavola digbyanahttp://www.orchidboard.com/community/attachments/cattleya-alliance/11364d1208045535-brassavola-digbyana-conditions-41208-orchids-006.jpg

Some Hybrid Greges

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