Confirmation of a natural hybrid species in Petrocosmea (Gesneriaceae) based on molecular and morphological evidence Petrocosmea glabristoma (Gesneriaceae), a New Species from Yunnan, China Petrocosmea shilinensis, a New Species of Gesneriaceae from Yunnan, China Petrocosmea xanthomaculata G.Q.Gou et X.Y.Wang,a New Species of the Genus Petrocosmea Oliv. Petrocosmea glabristoma (Gesneriaceae), a New Species from Yunnan, China