Alpinia vietnamica (Zingiberaceae), a new species from central Vietnam

Alpinia vietnamica H.D. Trap , Luu & Skonick. sp. nova (Zingiberaceae : Alpinieae) from the sect. Alpinia subsect. Catimbium with rugose leaves is described here. It occurs in central Vietnam and has been previously misidentified as A. rugosa described from Hainan, China. A detailed description, illustrations, as well as notes on distribution, ecology and phenology of the new species are given.