Data from: Pternopetalum porphyronotum sp. nov. (Apiaceae) from Sichuan, China

Pternopetalum porphyronotum, a new species from Dafengding Nature Reserve, Sichuan Province, China, is proposed. Diagnostic morphological characters, full description and detailed illustration are given based on the type material. A comparison between this new species and the two most similar congeners are presented.