Epidendrum polyanthostachyum Hagsater, Santiago and Garcia Ramirez 2013 GROUP Macrostachyum SUBGROUP Macrostachyum

Inflorescence in situ Parque Nacional Tatama Choco Colombia 8/17 2100 meters

Plant and flowers in situ Parque Nacional Tatama Choco Colombia 8/17 2100 meters

Photos by © Jay Pfahl


Photo by © Diego Calderon and his Colombian Birding and Orchid Photo Website

TYPE Drawing

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

Part Shade Cool Fall and AGAIN LATER Spring

Common Name The Many Flowered Macrostachyum Group Epidendrum

Flower Size .8" [2 cm]

Found in southwestern Colombia on the Pacific slope of the Cordillera Occidental at elevations of 1100 to 2050 meters as a large sized, cool growing epiphyte with canelike, erect, straight, terete, branching when mature stems enveloped by non-foliaceous, striated, rugose sheaths and carrying all along the main and branching stems, alternate, articulate, subcoriaceous, unequal in size, narrowly elliptic, acute, margin entire leaves that blooms in the fall and again in the later spring on a terminal, on the main stem and branches, racemose, erect, occuring only once, peduncle .8" [2 cm] long, subterete, thin, erect, straight, the base provided with a single bract similar to the floral bracts, rachis 5.6" [14 cm] long, cylindrical, 6.4 to 7.2" [16 to 18 cm] long, densely, simultaneously 35 to 40 flowered flowered inflorescence with as long as the ovary, triangular ovate, short-acuminate, amplexicaul floral bracts and carrying non-resupinate flowers.

"Epidendrum polyanthostachyum belongs to the GROUP Macrostachyum SUBGROUP Macrostachyum, which is characterized by the monopodial plants with sub-apical branching, rugose leaf sheaths, racemose inflorescence, and fleshy flowers with a simple, conduplicate lip embracing the column, and the nectary pubescent to papillose in front of the stigmatic cavity. The species is recognized by the narrowly elliptic, acute leaves, densely, many-flowered, cylindrical inflorescence, green or yellow, simultaneous flowers, short floral bracts .2 to .24" [5 to 6 mm] long; rachis straight, petals oblong-oblanceolate, .08" [2 mm] wide, the lip widely deltate, and the anther with a rostrum at the apex. Epidendrum grammipetalostachyum Hágsater has the leaves apically acuminate, a few-flowered inflorescence, linear petals .4 to .52" [1.0 to 1.3 mm] wide, the lip deltate with the apex truncate, the anther obtuse at the apex. Epidendrum chodrochilum syn Epidendrum macrostachyum has a lax-flowered inflorescence which produces many flowers in a long succession, with about a dozen open at one time, has larger leaves, apically bilobed, 3.6 to 5.44" x .88 to 1.32" [9 to 13.6 x 2.2 to 3.3 cm], floral bracts about up to twice the length of the ovary, petals linear-ligulate, obtuse, and the lip widely cordiform. Epidendrum platystachyum Hágsater is much smaller overall, narrowly elliptic-oblong, rounded leaves less than .48" [1.2 cm] wide, the inflorescence short and compact, rachis sinuous, with successive ochre colored flowers, the wide floral bracts embracing the short ovary and flower. Epidendrum humeadorense Hágsater & Dodson has larger leaves 3.4 to 5.6" [8.5 to 14 cm] long, a lax, few-flowered inflorescence 4 to 7 flowers, rachis flexuous, floral bracts prominent .28 to .68" [7 to 17 mm long, flowers larger sepals .56 to .8" [14 to 20 mm] long, petals elliptic, .14 to .26" [3.5 to 6.5 mm] wide, the base of the lip glabrous, and the nectary short, without penetrating the ovary." Hagsater etal 2013


References W3 Tropicos, Kew Monocot list , IPNI ; Icones Orchidacearum 14 Plate 1433 Hagsater & Santiago 2013 See recognition section; Icones Orchidacearum 14 Plate 1477 Hagsater & Sanchez 2013 drawing good; Orchids of the Department of Valle De Cauca Colombia Vol 2 Kolanowska, Hagsater etal. 2014 drawing/photo fide; Icones Orchidacearum 15 [2] Plate 1586 Hagsater & Sanchez 2016 see recognition section; Orquideas, Tesoro de Colombia Vol 2 Ortiz & Uribe 2017 photo fide; Orquideas de Farallones de Cali Galindo-Tarazona, Haelterman, Zuluaga Trochez and Sebastian Moreno 2020 photo fide