Abstract
Four new species of Begonia, namely B. abbreviata C.-I Peng, B. calciphila C.-I Peng, B. sphenantheroides C.-I Peng and B. tamdaoensis C.-I Peng are documented from northern Vietnam. Detailed descriptions, line drawings, color plates, chromosome data, foliar SEM observations and comparisons with phenetically similar species are provided to aid in identification.