Dendrobium popaense (Orchidaceae)―A New Species from Myanmar

Abstract

A new orchid species, Dendrobium popaense T.Yukawa & Nob.Tanaka is described from Mt. Popa, central Myanmar. It is discriminated from the closely related D. bensoniae by its smaller size in perianth lobes, its higher ratio of the length of mentum to dorsal sepal, and its conspicuously papillate operculum. From D. jinghuanum, the new species is separable by its lack of purple floral pigmentation, its lemon-yellow disk of labellum, its smaller size in perianth lobes, its higher ratio of the length of mentum to dorsal sepal, and its short, erect stem.