<i>Diplazium zangnanense</i> , a new species of the twinsorus‐fern genus <i>Diplazium</i> (Athyriaceae) from Xizang Province, China

Diplazium zangnanense , a new species of Diplazium Sw. from Medog county, Xizang Autonomous Region, China, is described and illustrated. Morphological comparisons between this new species and similar ones (e.g. D. kawakamii , D. medogense , D. muricatum , D. multicaudatum and D. spectabile ) are provided. Molecular evidence shows that the new species is closely related to D. multicaudatum . The most distinctive characters of D. zangnanense are its decumbent to erect rhizomes, bicolorous scales with toothed margin on the stems, and oblong sori.