Abstract
BACKGROUND: Haniffia Holttum is a genus of three described species of terrestrial gingers hitherto restricted to Peninsular Thailand and various localities in Peninsular Malaysia. RESULTS: With generic placement confirmed using nrITS, trn K and mat K plastid sequence data, Haniffia santubongensis S.Y. Wong & P.C. Boyce is described as a taxonomically novel species representing a new generic record for Borneo, to where it is endemic to Mount Santubong, Kuching Division, NW Sarawak, Malaysian Borneo. An identification key to all species is given and H. santubongensis is illustrated from living plants. CONCLUSION: Haniffia santubongensis is the fourth species of Haniffia so far described, and the first occurring on sandstone.