Pleurothyrium amissum (Lauraceae), a New Endemic Tree from the Talamanca Montane Forest in Costa Rica

Abstract

Pleurothyrium amissum P. Juárez & J. F. Morales (Lauraceae), a new species endemic to the highland oak forests of the Costa Rican Talamanca range, is described and illustrated. Pleurothyrium amissum and P. pauciflorum van der Werff & Hammel have similar floral morphology but differ by their height, leaf size, inflorescence size, number of flowers per inflorescence, flower color, and habitat. Photographs, a distribution map, and a key to the species of Pleurothyrium Nees in Costa Rica are presented.