Epidendrum bianthogastrium Hágsater & Dodson 2001 GROUP Geminiflorum

Photo by © Spiro K. and The Greek Orchid Society Website

TYPE Drawing

TYPE Drawing by © Jimenez, Hágsater & E.Santiago and The AMO Herbario Website


Common Name The Two Flowered Gastrium Epidendrum

Flower Size .6" [1.5 cm]

Found in Colombia and Ecuador on rocks in road cuts at elevations around 1700 to 2400 meters as a miniature to small sized, cool to cold growing lithophyte with erect, cane-like, terete, thin, fleshy stems producing new stems from the middle nodes of the previous stem and carrying 3 to 5, along upper 1/2 of the stem, ovate, acute, articulate below into the base leaves that blooms in the later winter on a terminal, erect, occuring only once, from a mature stem, .4 to to 1.2" [1 to 3 cm] long, racemose, 2 flowered inflorescence with triangular, acuminate, shorter than the ovary floral bracts and carrying simultaneously opening, non-resupinate flowers.

"Epidendrum bianthogastrium belongs to the GROUP Geminiflorum which is recognized by its sympodial habit, with new stems arising from a middle internode of the previous stem, the presence of an ovate spathe and the excavated disc of the lip, somewhat similar to many Malaxis, with the area covered by papillae. The species is identified by its stems, relatively small flowers with sepals .32 to .38" [8 to 9.5 mm] long, always 2 per inflorescence, green with coppery hue, A triangular, cordate lip in a non-resupinate, somewhat horizontal position. Similar to E. polyanthogastrium which has fleshy, thickened stems and more numerous flowers, up to 8. Epidendrum amplexigastrium Hágsater has a trilobed, cuneate, lip, with the lateral lobes semi-obovate and directed forwards and embracing the column and overlapping in natural position. Epidendrum megagastrium has a triangular, cordate lip but the lateral lobes do not cover the apex of the column, the sepals are .8" [20 mm] long. Epidendrum quisayanum Schltr. is easily recognized by its bright purple flowers." Hagsater etal 2001


References W3 Tropicos, Kew Monocot list , IPNI ; *Icones Orchidaceaum 4 Plate 417 Hagsater & Sanchez 2001 drawing fide; Orquideas, Tesoro de Colombia Vol 2 Ortiz & Uribe 2017 photo/drawing fide; ; Icones Orchidacearum 18(2) Plate 1853 Hagsater & Jimenez 2021 see recognition section; Icones Orchidacearum 18(2) Plate 1869 Hagsater & Jimenez 2021 see recognition section; Icones Orchidacearum 18(2) Plate 1889 Hagsater & Jimenez 2021 see recognition section