!Trigonidium obtusum Lindley 1837 Photo by Lourens Grobler

Flower CloseupPhoto courtesy of Patricia Harding

Part shadeWarm to Hot Winterand Spring

Common Name The Obtuse Trigonidium

Flower Size more than 3/8" [over 1 cm]

A medium sized, hot to warm growing species that is found in Ecuador, Colombia, Brazil, The Guianas, Bolivia and Venezuela in tropical wet forests in large trees at elevations of 220 to 1000 meters, with ovoid, compressed, 2", smooth pseudobulbs closely spaced on the rhizome, with 2 apical, conduplicate below into the short petiolate base leaves that are linear-lanceolate, pointed, coriaceous, and 8-20" long. It has numerous basal inflorescence that are stiff, erect, wiry, 5" [12 cm] long, single flowered, inflorescence arising on mature pseudobulb and holds the long lasting flower at mid-leaf and blooms in the winter and spring.

References W3 Tropicos, Kew Monocot list , IPNI ; Lankester's Epidendra Website CR ; *Edwards's Bot. Reg. 23: t. 1923. 1837; Die Orchideen Schlechter 1915; Iconografia de Orchidaceae Do Brasil Hoehne 1949 drawing good; Flora Brasilica Vol XII VII 115-147 Hoehne 1953 drawing good; Venezuelan Orchids Illustrated Vol 1 Dunsterville & Garay 1959 drawing good; Flora de Venezuela Volumen XV Part 4 Foldats 1970 drawing good; Orchidaceae Brasilenses Band 2 Pabst & Dungs 1977 drawing fide; Orchids of Venezuela, An Illustrated Field Guide Vol 3 Dunsterville & Garay 1979 drawing good; Icones Planetarum Tropicarum Plate 598 Dodson 1981 drawing ok; Native Colombian Orchids Vol 4 COS 1992 photo fide; Rudolf Schlechter Die Orchideen lieferung 29 1777 - 1840 Brieger 1994; Orchids of Venezuela [An illustrated field guide] Vol. 3 Ramiro and Carnevali 2000 drawing good; Flora of the Venezuelan Guayana Vol 7 Steyermark, Berry, Yatskievych and Holst 2003 drawing ok; Orquideas de la Serrania del Baudo Misas Urreta 2006 drawing/photo fide; Orquideas de Roirama Luz & Franco 2012 photo fide;

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