Found sparingly on the Zhongdian plateau, and in Muli, Sichuan, this delicate species grows on limestone in shady hollows or caves. The leaves are aromatic, slightly hairy with hairy petioles. Scape is efarinous, hairy and flowers are arranged in a short spike or raceme. W. W. Smith & Fletcher in Trans. Roy. Soc. Edinb. 61:446 1946 includes the collection Yu 13861 within P. aromatica. This specimen is a paratype of P. runcinata and should not be included in P. aromatica though the two species are similar. Thought by some authorities to belong in Section Malvacea.