Pseudostellaria fangiana (Caryophyllaceae), a new species from Chongqing, China

Pseudostellaria fangiana, a new species from the Wulipo National Nature Reserve in Wushan County, northeastern Chongqing, China, is described and illustrated. Morphologically, Pseudostellaria fangiana resembles Pseudostellaria heterantha. However, the new species can be distinguished by presence of stolons, with several root tubers in a row, branched at apex, homomorphic leaves, smaller leaf blades, and seeds minutely spiny.