Abstract
Curcuma papilionacea, an unusual new species of Curcuma subgenus Hitcheniopsis (Zingiberaceae) is described and illustrated here. It is known only from Satun province in southern Thailand, and is easily distinguishable among all species of subgenus Hitcheniopsis by its inflorescence of green bracts and pea-like flowers with a small labellum and very prominent lateral staminodes. It also has prominently developed anther spurs, a character not yet recorded in this subgenus. It is compared to the four morphologically closest species which are Curcuma alismatifolia, C. harmandii, C. rhabdota and C. saraburiensis. A preliminary IUCN conservation assessment of Critically Endangered (CR), and notes on its distribution and ecology are also provided.
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