Scaphosepalum luannae, a new species, and Scaphosepalum anchoriferum (Orchidaceae: Pleurothallidinae) from North-Western Ecuador

Abstract

A new species, Scaphosepalum luannae, is described, and new records for Scaphosepalum anchoriferum from Ecuador are presented. Scaphosepalum luannae is superficially similar to S. swertiifolium but its differs in the the dark green leaves, conspicuously nerved at the abaxial side and shiny at the adaxial side, the sub-quadrate petals with a basal lobe at the columnar margin and the lip with a truncate base without lobes with an oblong and flat hypochile. Scaphosepalum luannae and S. anchoriferum were discovered growing sympatrically in a poorly explored cloud forest from north-western Ecuador, near the border with Colombia. Resumen. Una nueva especie, Scaphosepalum luannae, es descrita y se presenta el nuevo registro de Scaphosepalum anchoriferum en Ecuador. Scaphosepalum luannae es superficialmente similar a S. swertiifolum pero se diferencia en las hojas verdes, oscuras, conspicuamente nervadas en el lado abaxial y brillosas en el lado adaxial, los pétalos sub-quadratos con un lóbulo basal en el margen columnar y el labelo con su base truncada sin lóbulos y, un hipoquilo oblongo y plano. Scaphosepalum luannae y S. anchoriferum se descubrieron creciendo de manera simpátrica en un bosque nublado poco explorado del nor-oeste de Ecuador, muy cerca de la frontera con Colombia. KEy words / PaLaBras cLavE: Ecuador, nueva especie, new species, Reserva Dracula, Scaphosepalum anchoriferum Received 9 May 2019; accepted for publication 26 November 2019. First published online: 9 December 2019. Licensed under a Creative Commons Attribution-NonCommercial-No Derivs 3.0 Costa Rica License. doi: http://dx.doi.org/10.15517/lank.v19i3.39971