Pseudostellaria tianmushanensis sp. nov. (Caryophyllaceae) from Zhejiang, China.

Pseudostellaria tianmushanensis G. H. Xia & G. Y. Li, collected from the Tianmu Mountains Nature Reserve in northwestern Zhejiang, China, is described and illustrated. This new species is similar to P. rupestris Pax., but differs by having a string of fusiform or ovoid-globose tubers, leaves that are narrow elliptic-lanceolate, glabrous, with cuneate base with scattered multi-nodulate hairs, papillate margins and basipetalous variation in floral morphology. Moreover, the seed tubercle ornamentation also supports the recognition of the new species. A key to the species of Pseudostellaria in Zhejiang province is provided. [ABSTRACT FROM AUTHOR]