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''Cattleya cernua'', commonly known as the Nodding Sophronitis, is a species of orchid occurring from Brazil to northeastern Argentina. It was the type species of the genus ''Sophronitis'' until the genus was made synonymous with Cattleya. Twenty plants of ''S. cernua'' have received a total of 22 AOS awards. The described flowers range from 1.9 cm to 3.2 cm horizontal spread and from 2.0 cm to 3.0 cm vertical spread.〔Ingrid Schmidt-Ostrander () "Revisiting Sophronitis cernua, a Nodding Orchid, Modest in Size", "COC The Canadian Orchid Congress〕 In nature, ''Cattleya cernua'' is pollinated by hummingbirds drawn to the blooms' warm colors. The orchid's cryptic pollinia (masses of pollen which adhere together) provide an interesting adaptation to hummingbird pollination. ''C. cernua'' is pollinated when sticky pollinia are deposited on a bird's beak. While most orchid pollinia are yellow, hummingbird pollinated orchids' pollinia are darker colored. A bright yellow pollen would produce a sharp visual contrast against the color of the beak, and the bird would be stimulated to clean his beak. Such a behavior which would be a reproductive disaster for the orchid. Therefore, to avoid detection, half of all hummingbird-pollinated orchids evolved dark pollinia−blue, gray or brown−which most closely approaches the colors which predominate in the birds' beaks and blend in more successfully.〔Carol Siegel ('ORCHIDS AND HUMMINGBIRDS: SEX IN THE FAST LANE' ) Orchid Digest, Jan., Feb., Mar. 2011〕 == Species description == *Usually blooms with 2-4 bright red-orange blooms, 1" to 1 1/4" (to 2.7 cm ) in size *Monofoliate pseudobulbs with appx 1" leaves *flowers in Spring in nature, but can bloom year-round in cultivation *generally warm growing orchid, temps range from 50-110F in natural environment *can be found growing epiphytically or occasionally lithophytically *chromosome count: 2n= 40 〔Ana Isabel Honfi et al (2009) ('Chromosome studies in Orchidaceae from Argentina' ) Genetics and Molecular Biology, 32, 4, 811-821 (2009)〕 In cultivation, this species grows best when mounted, in warm and bright conditions. 〔("Sophronitis cernua" ), ''IOSPE''〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cattleya cernua」の詳細全文を読む スポンサード リンク
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