Epidendrum hamatum (Garay) Dressler 1971 GROUP Mancum SUBGROUP Stenoglossum

Inflorescence

Photos by © The Orquideologia Website

Drawing

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

Drawing

Original Drawing by © Padre Pedro Ortiz Conserved at the Herbario de la Universidad Javeriana, Bogota Colombia

Part sun Cool ColdFall

Common Name The Hook-Shaped Epidendrum [refers to the lip]

Flower Size .6" [1.5 cm]

Found in Antioquia department of Colombia on the Cordillera Central at elevations of 1800 to 2300 meters as a small to medium sized, cool to cold growing epiphyte with cane-like, arising from the lower nodes of the previous stem, erect, straight, terete toward the base, laterally compressed towards the apex stems with the base enveloped by 1 to 2 non-leaf-bearing sheaths and carrying, 1 to rarely 2, lanceolate-elliptic oblong, obtuse, aristate, margin entire leaves that blooms in the fall on an erect then slightly to completely arching, apical, racemose, cylindrical, generally densely 25 to 28, simultaneously flowered inflorescence arising through 1 to rarely 2, ancipitous, oblong, acute, aristate spathaceous bracts and carrying non-resupinate flowers.

"Epidendrum hamatum belongs to the GROUP Mancum which is characterized by the sympodial habit, few leaved stems, racemose inflorescence with 1 to 2 ancipitose, long, spathaceous bracts with parallel sides, and SUBGROUP Stenoglossum which has non resupinate flowers, a short column, the lip entire, linear, or 3-lobed and then the midlobe linear. The species can be recognized by the 1 to 2 leaved stems, the creamy to greenish white flowers with purple-red dots, linear petals, the apex dilated, spatulate, 3-lobed lip, the lateral lobes minute, hamate, and the linear-filiform midlobe with the apex sagitate to rhomboid. It is similar to Epidendrum coryophorum (Kunth) Rchb.f. which is widespread from the Cordillera Central in Colombia through the Cordillera oriental in Ecuador, has purple red flowers, generally with the apical third white to greenish white, large petals, entire, linear, ecallose lip. Epidendrum cylindrostachys Rchb.f. is superficially similar, has resupinate flowers, the lip membranaceous and not reduced, spreading sepals and petals, the lateral lobes of the lip falcate, the midlobe with a narrow, lanceolate-ligulate, fleshy isthmus, and the apex obtuse to retuse, the column.22 to .24" [5.5 to 6 mm] long." Hagsater etal 2009

Synonyms *Stenoglossum hamatum Garay 1969

References W3 Tropicos, Kew Monocot list , IPNI ; Icones Orchidacearum 12 Plate 1230 Hagsater 2009 see recognition section; Icones Orchidacearum Part 12 Plate 1252 Hagsater 2009 drawing fide; Orquideas, Tesoro de Colombia Vol 2 Ortiz & Uribe 2017 drawing/Photo fide; Icones Orchidacearum 18(1) plate 1818 2020 see recognition section

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