Caularthron bilamellatum (Rchb. f.) R.E. Schult. 1958 Photo courtesy of Jay Pfahl
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Common Name The Two-Ledged Caularthrom
Flower Size up to 1 1/2" [up to 3.75 cm]
Found in Mexico, Guatemala, Belize, El Salvador, Honduras, Nicaragua, Costa Rica, Panama, Trinidad & Tobago, Venezuela, Colombia, Ecuador and Peru as a small sized, hot to warm growing epiphyte found in dry tropical forests at elevations of sealevel to 700 meters with long-cylindrical, fusiform or elongate-ovoid pseudobulbs enveloped by white, papery bracts carrying, 3 to 4, towards the apex, oblong or elliptic-oblong, fleshy, coriaceous, obtuse leaves that blooms on an apical, to 3' [90 cm] long, erect, occasionally branched, racemose inflorescence arising on a mature pseudobulb with several to many scented flowers that often do not open well occuring in the late winter and spring. This plant is cleistogamous [self-pollinating] and often has the flowers not opening as they are already fertilized. This species can bloom out of the apex of a newly emerging psuedobulb that will not develop further if the plant is under stress.
Synonyms Caularthron bivalvatulum [Schlechter] Jones 1974; Diacrium bigibberosum (Rchb. f.) Hemsl. 1883; Diacrium bilamellatum (Rchb. f.) Hemsl. 1883; Diacrium bilamellatum var reichenbachianum Schlechter 1922; Diacrium bivalvatulum Schltr. 1923; Diacrium ulmeckei Kraenzlin 1927; Diacrium venezuelanum Schltr. 1919; Epidendrum bigibberosum Rchb. f. 1862; *Epidendrum bilamellatum Rchb. f. 1862
References W3 Tropicos, Kew Monocot list , IPNI ; Venezuelan Orchids Illustrated Vol 1 Dunsterville & Garay 1959; Flora de Venezuela Foldats Volumen XV Part 3 1970; Manual of Cultivated Orchids Bechtel, Cribb & Laurent 1982; Manual of Orchids Stewart 1995; An Illustrated Encyclopedia of Orchids Pridgeon 1982; Encyclopedia of Cultivated Orchdis Hawkes 1987; Orchidaenfloren Kordillerenstaaten 1: Venezuela Schlechter 1920; Icones Planetarum Tropicarum Plate 020 Dodson 1980; Icones Planetarum Tropicarum Plate 634 Hamer 1982; Native Orchids of the Eastern Caribbean Kenny 1988; Orchids of Venezuela; An Illustrated Field Guide Dunsterville & Garay 1979; Las Orquedias de Tachira Fernandez 2003; Vanishing Beauty; Native Costa Rican Orchids Vol 1 Pupulin 2005
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