Abstract
Boesenbergia quangngaiensis, a new species of Zingiberaceae from Quảng Ngãi Province in central Vietnam is described and illustrated. The species is similar to B. plicata, but can be distinguished by its leaves which are sessile or with short petioles, longer and sparsely pubescent ligules, elliptic lamina with pubescence on both surfaces, shorter bracts and bracteoles, suborbicular to oblong-obovate labellum with a deep red band at the centre, reddish-pink patch at the tip, short anther, and pubescent ovary. A key to the species of Boesenbergia in Vietnam is provided.