Abstract
The genus Koellensteinia Rchb. f. (Orchidaceae) encompasses 17 South American species. Problems related to the delimitation of its species are still present and recent phylogenetic studies denote that the genus, as presently conceived, is not monophyletic, and its relation with the nearest genera is uncertain. This project aims to: I) propose a phylogenetic hypothesis for Koellensteinia a…