Morphological variation within and among populations of closely related taxa of Parnassia sect. Saxifragastrum from China was studied based on literature, specimen examinations and field survey. Parnassia angustipetala T.C. Ku, P. yulongshanensis T.C. Ku, P. longipetaloides J.T. Pan, and P. yanyuanensis T.C. Ku were reduced to synonymy of P. yunnanensis Franchet. Parnassia humilis T.C. Ku is different from P. yunnanensis, and is proposed as a new synonym of P. trinervis Drude. The geographic distribution and illustrations of P. yunnanensis and P. trinervis are also presented.
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Vol. 46 • No. 6