A new species from Thailand, Ceropegia thailandica Meve (Apocynaceae-Asclepiadoideae-Ceropegieae) is described and illustrated. The new species is related to the Indian C. spiralis, and belongs to a group of tuberous, non-twining, grass-like species that are widespread on the Indian subcontinent. The single, exeedingly long-stalked flowers with ovoid basal inflations and very long, tightly spiralled corolla lobes, leaving only small and characteristically auriculate openings for insect visitors, make the new species an unrivalled appearance in Ceropegia.