Blumea (Compositae: Inuleae) in continental Southeast Asia

A revision of the genus Blumea DC. in continental Southeast Asia, including Myanmar, Thailand, Laos, Cambodia, Vietnam and Peninsular Malaysia, is presented covering aspects of taxonomic history, key to taxa, synonymy, descriptions, and notes on distribution, ecology and phenology. Blumeopsis is reduced. Twenty-seven species are recognised, one of which is divided into two varieties. The lectotypes of 26 names are designated and three names are resuscitated here: B. flava, B. hamiltonii and B. macrostachya.