Epidendrum coordinatum Rchb.f. 1876 GROUP Macrostachyum SUBGROUP Macrostachyum

Drawing by © Jimenez and The AMO Herbaria Website


Common Name The Coordinated Epidendrum

Flower Size 1.2" [3 cm]

Found in Antioquia department of Colombia on the Cordillera Occidental at elevations of 2900 to 3000 meters as a giant sized, cold growing, monopodial terrestrial with branching when mature, cane-like, terete, erect, straight stems carrying numerous on the main stem, 5 to 8 on the branches, articulate, alternate, suberect, coriaceous, lanceolate, apex rounded, minutely apiculate, margin entire leaves that blooms in the later summer on a terminal, erect, to 5.6" [14 cm] long on the primary stem, 2 to 4" [5 to 10 cm] long on the branches, racemose, erect to arching, occuring only once, peduncle to .28" [7 mm] long, terete, straight, rachis straight, 1.78 to 5.32" [4.3 to 13.3 cm] long, in a heliocoid fashion, successively to 11 flowered inflorescence with prominent slightly longer than the ovary, gradually smaller above, narrowly ovate-lanceolate, acuminate, amplexicaul floral bracts and carrying non-resupinate, very fleshy, pale yellow to green flowers.

"Epidendrum coordinatum belongs to the GROUP Macrostachyum SUBGROUP Macrostachyum, which is characterized by the monopodial plants with sub-apical branching, rugose leaf sheaths, large leaves generally spreading, racemose, erect inflorescence, and fleshy flowers generally green to black (ripe olive colored), as well as yellow to pink to purple, with an entire, conduplicate, generally ecallose lip embracing the column, and the nectary pubescent to papillose in front of the stigmatic cavity and at least at the base of the lip. The species is recognized by the lanceolate leaves apically rounded, the inflorescence is 2 to 5.6" [4.5 to 14 cm] long, few-flowered, rachis straight, the floral bracts narrowly ovate-lanceolate and the sepals with a high, very prominent dorsal keel, the apex uncinate. Epidendrum chondrochilum F.Lehm. & Kraenzl. is vegetatively similar, but the rachis is clearly flexuous, the floral bracts are widely ovate (all similar in size), sepals apiculate, petals oblanceolate. Epidendrum xylostachyum Lindl. has oblong to oblong-lanceolate leaves, the inflorescence is 2.8 to 5.2" [7 to 13 cm] long, and the flowers are densely aggregate, floral bracts are cymbiform, widely ovate with the apex rounded, sepals minutely apiculate, petals obovate-elliptic. Epidendrum platystachyum Hágsater has oblong leaves and a very short, few-flowered inflorescence .6 to 1.2" [1.5 to 3 cm] long, sepals not uncinate, petals oblanceolate, with the apex rounded. Epidendrum sarcostachyum Hágsater, E.Santiago & E.Becerra is vegetatively very similar, but only the lateral sepals are very fleshy, the apex obtuse and is not uncinate, column has a pair of apical wings, the upper corner a right angle, the lower corner rounded." Hagsater etal 2015


References W3 Tropicos, Kew Monocot list , IPNI ; Repert. Spec. Nov. Regni Veg. Beih. 7: 245 Schlechter 1920; Icones Orchidacearum 3 Plate 317 Hagsater & Sanchez 1999 see recognition section; Icones Orchidacearum 15 [1] Plate 1514 Hagsater Santiago 2015 drawing fide; Icones Orchidacearum 15 [1] Plate 1536 Hagsater & Sanchez 2015 see recognition section; Icones Orchidacearum 15 [1] Plate 1558 Hagsater & Sanchez 2015 see recognition section; Orquideas, Tesoro de Colombia Vol 2 Ortiz & Uribe 2017;