Orchidaceae werckleanae: typification of Costa Rican orchid species described from collections by K. Wercklé

A catalogue of 84 orchid species described by R. Schlechter from plants collected in Costa Rica by Karl Wercklé is presented. Lectotypification is provided for 60 of the 84 species. Previously lectotypified species, based on syntypes, including collections by Wercklé, and neotypified taxa, are recorded, and bibliographical references to the designations of lectotypes and neotypes are provided. Neotypes are selected for eight species, for which no isotypes, paratypes or other material associated with the protologue are known to exist. Illustrations of most of the lectotypes are provided. Epidendrum amparoanum, Pachystele densa and Trigonidium amparoanum are not typified because of lack of appropriate material and because of taxonomic uncertainties.