from Ha Giang province, northern Vietnam is described and illustrated. Diagnostic features of the new species are a short rhizomatous stem, (2-)3-foliolate or simple leaves, and pink-purple flowers. The described species is distinct from closely allied in having longer sepals, shape and obcordate apex of petal limbs, shorter flower stem, number and tooth shape of basal leaves; it differs from and in having stem leaf, retuse apex and longer of central leaflet, number and (2-)3-foliated (or simple) of leaf. With the support of molecular data, the new species was clearly distinguished from other species in the group by eight autapomorphic characters in nrITS sequence. A key to all species of is provided. We suggest the IUCN conservation status of to be "Critically Endangered". A newest checklist of the family Ranunculaceae in Vietnam is updated.
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| http://dx.doi.org/10.7717/peerj.9874 | DOI Listing |
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