Morphological Variation of Heterostemma alatum (Apocynaceae: Asclepiadoideae)

Abstract

Variations in the floral morphology, especially the corona lobes, of Heterostemma alatum are discussed based on the earlier descriptions and the consultation of the deposited specimens in different herbaria. In addition, we observed pubescent corona in H. alatum. A detail description and photo plates of the recent collected material are provided for easy identification of the species.