A yellow flowered species originally found on the Doshong La, Tibet. It is distinguished by the open faced flower, and the efarinose, linear-lanceolate leaves. Capsule almost globose, disintegrating at maturity. The variant P. falcifolia var. farinifera has yellow farina and is found at Bomi Xian. As this species grows in very wet conditions, it would be interesting to survey the type population for evidence of farina. See related: P. agleniana, P. elizabethae, P. obliqua.