Henckelia medogensis (Gesneriaceae), a new endemic species from Xizang, China.

Henckelia medogensis, a new species from Mêdog (SE Xizang, China), is described and illustrated. The new species is mostly similar to H. lallanii and H. peduncularis, but clearly differs from the former mainly by its densely red pubescent stems and leaves, purple flowers, larger corolla size, and with white pubescent outside of the corolla tube. It also differs from the latter mainly by its single flower, free and smaller bracts, corolla tube nearly straight and ovary hairy. H. medogensis was assessed to be vulnerable based on criteria outlined by IUCN Red List Categories. [ABSTRACT FROM AUTHOR]