Reconsideration of Heteranthocidium (Oncidiinae, Orchidaceae): new species and taxonomic transfers

Abstract

A new insight into the orchid genus Heteranthocidium is presented. The specific composition of the taxon is clarified. Eighteen new combinations within Heteranthocidium are proposed. Four of the species initially included in the genus, i.e. Oncidium boothianum, O. exalatum, O. fuscans and O. pollardii, should be no longer included in Heteranthocidium as they do not correspond to the morphological concept of the genus. The results of the conducted studies are compared with the molecular data on Oncidiinae. Seven new Heteranthocidium species are described and illustrated.