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.
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