Abstract
Summary The genus Hypobathrum in Thailand is revised, based on the morphological characters found in herbarium specimens from Thailand and neighbouring countries including Bangladesh, Myanmar, Cambodia and Peninsular Malaysia. In this study, three species of Hypobathrum are recognised, among them, H. venulosum is a newly recorded species in this region. An identification key is provided for the species, along with descriptions, synonyms, distribution ranges and vernacular names (if available).