A new Dichocarpum W.T.Wang & P.K.Hsiao (Ranunculaceae) species from Guizhou, China

A new species of <i>Dichocarpum</i> from Guizhou, China, is described and illustrated. Morphologically, it resembles <i>D. auriculatum</i>, <i>D. trifoliolatum</i>, <i>D. basilare</i>, <i>D. franchetii</i>, <i>D. arisanense</i>, <i>D. adiantifolium</i>, and <i>D. uniflorum</i>. However, it differs from these seven species by its creeping stolons, 3-5-foliolate leaflets with scalloped or suborbicular shape, and an inflorescence consisting of a single flower. The phylogenetic relationship with other species of the genus is examined based on three chloroplast gene segments (<i>matK, trnL-F, trnH-psbA</i>) and one nuclear ribosomal DNA region (ITS). In addition, an identification key to all Chinese species of <i>Dichocarpum</i> is provided.