Taxonomic revision of Disporum (Colchicaceae) from Thailand including four new species

Abstract

We present a taxonomic revision of the genus Disporum in Thailand based on Thai specimens including descriptions of the genus and species, a key to the species, illustrations and lectotypifications. The dorsifixed an-ther attachment is a new character for the genus. There is a total of six species in Thailand, including the four new species described here, namely D. chiangdaoense, D. dorsifixerum, D. phuhinrongklaensis and D. scabridum, and two well-known species D. calcaratum and D. cantoniense. Anatomical and pollen morphological characters can be used for species diagnoses and they strongly support the morphological recognition of the four new species. New lectotypifications of synonyms are provided for D. wallichii, Uvularia calcarata and U. hamiltoniana.