Epidendrum triangulabium Ames & C.Schweinf. 1930 GROUP Tandapianum

Drawing by © Hagsater and The AMO Herbaria Website


Common Name The Triangular Lip Epidendrum [refers to the lip shape]

Flower Size 1.2" [3 cm]

Found in Costa Rica and Panama in montane forests at elevations of 600 to 1000 meters as a mini-miniature to miniature sized, warm growing epiphyte with simple, cane-like, basally terete, laterally compressed above, newly arising from the basal internodes of the previous stem and carrying 9 to 16, two-ranked, Dichaea-like, facing upwards with the blade facing the stem, all along the stem, articulate, distichous, chartaceous, elliptic, obtuse, unequally bilobed, minutely apiculate, margin entire leaves that blooms in the late summer through early winter on a terminal, occuring only once, peduncle with a single, oblong-lanceolate, rounded, conduplicate bract, subsessile, single flowered inflorescence with shorter than the ovary, hidden within the bract of the peduncle and carrying a non-resupinate, concolor, light green flower.

"Epidendrum triangulabium belongs to the GROUP Tandapianum , which is recognized by lhe subcaespitose habit, the 2-ranked leaves facing one side of the stem, and the inflorescence producing single flowers, with a large triangular, bicallose lip. The species is recognized by the short, prostrate stems to 6" [to 15 cm] tall, covered by elliptic, bilobed leaves, the single-flowered, apical inflorescence, the flower green, concolor, with lanceolate, acuminate sepals .46 to .508" [11.5 to 12.7 mm] long, and the widely triangular-sagittate lip, somewhat recurved at the base. Epidendrum tandapianum Dodson & Hágsater has taller, erect, plants, longer, linear-elliptic leaves, an elongate inflorescence producing successive single flowers over a long period, and somewhat similar flowers, the sepals about .78 to .8" [18 to 20 mm] long." Hagsater etal 2008


References W3 Tropicos, Kew Monocot list , IPNI ; The Genus Epidendrum Ames 1936; Ceiba Vol 5 No 1 L O Williams 1956; Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 9 513 - 576 Brieger, Maatsch and Senghas 1977 as Pleuranthium triangulabium; Field Guide to the Orchids of Costa Rica and Panama Dressler 1993; Manual de las Plantas de Costa Rica Vol 3 Hammel, Grayum, Herrera and Zamora 2003; Icones Orchidacearum 11 Plate 1190 Hágsater & Santiago 2008 drawing fide; Icones Orchidacearum 12 Plate 1296 Hagsater 2009 see recognition section; Icones Orchidacearum 12 Plate 1297 Hagsater 2009 see recognition section; Orquideas, Tesoro de Colombia Vol 2 Ortiz & Uribe 2017 photo fide;