Recent changes in Thai Euphorbiaceae sensu lato

Abstract

Alchornea trewioides (Benth.) Müll.Arg. appears to be a misapplied name in Thailand, the correct name for the species is A. parviflora (Benth.) Müll.Arg. The variety Alchornea rugosa var. macrocarpa Airy Shaw is not recognized any longer. The monotypic genus Chorisandrachne Airy Shaw is reinstated, and separated again from Leptopus Decne based on phylogenetic evidence. The circumscription of Mallotus Lour. has changed drastically. A part of Mallotus is separated as Hancea Seem., while Trewia Lour. is united with Mallotus. Koilodepas Hassk. appears to be present in Thailand with three species instead of one, and Galearia Zoll. & Moritzi is present with two instead of a single species. The genera Richeriella Pax & K.Hoffm. and Flueggea Willd. are united under the latter name.