Abstract

YEPES-RAPELO, Diego; CARBONO-DELAHOZ, Eduino  and  PINTO-MENDEZ, Michelle. Orchids of the Gaira river, Sierra Nevada de Santa Marta, Colombia. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2015, vol.39, n.153, pp.475-480. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.244.

As a result of a study of the Orchidaceae in the Gaira River basin, in the Sierra Nevada de Santa Marta, Colombia, this essay reports 115 species distributed in 64 genera, 19 subtribes and nine tribes. The number of species exceeds all known records so far for the Sierra, although they were collected in 1 % of its area. Epidendroideae, with 104 species and 55 genera, was the richest subfamily; Pleurothallidinae stood out as the subtribe encompassing the largest number of species (22 species and 11 genera). Of the species present, 33.9% were distributed in seven genera, Epidendrum being the richest with 13, while 64.04% of the genera were monospecific. Epiphytic species equaled 77.39% in the territory and 21.73% of them were terrestrial. Oncidium nevadense was the only endemic species collected in the study area, and together with O. gloriosum and O. naevium they are considered endangered species in the country.

Keywords : Diversity; epiphytes; taxonomy; Orchidaceae.

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