No.8 MENG-QI HAN, QUAN YUAN, TIAN-FENG LU, HANG JIANG & YAN LIU

Petrocosmea chrysotricha sp. nov. (Petrocosmea, Gesneriaceae), a species previously mistaken for P. begoniifolia on marlstone cliffs in Yunnan, China

Nordic Journal of Botany(Accepted 28 November 2017)

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ABSTRACT

        Petrocosmea chrysotricha M.Q.Han, H. Jiang & Yan Liu, a new species from Yunnan, China, is described and illustrated. Petrocosmea chrysotricha was found growing with P. melanophthalma on damp marlstone cliffs in evergreen broad-leaved forest on Mopan Shan. The new species has been grown for decades by Gesneriad enthusiasts under the name P. begoniifolia for decades and it is indeed similar to P. begoniifolia in its oblique campanulate corolla tube, but differs by having flaments covered with golden lanate indumentum in the middle part and by having primrose yellow flowers at the beginning if anthesis, then turning white.

Figure 1. Petrocosmea chrysotricha sp. nov. (A)–(B) habit, (C) adaxial leaf blade surface, (D) abaxial leaf blade surface, (E) flower in front view, (F) flower in side view, (G) calyx, (H) adaxial lip, (J) dissected corollas, (K) abaxial lip, (L) habitat, (M) stamens, (N)capsules and (P) pistil.

Figure 2. Petrocosmea begoniifolia. (A)–(B) habit, (C) adaxial leaf blade surface, (D) abaxial leaf blade surface, (E) flower in front view, (F) flower in side view, (G) calyx, (H) adaxial lip, (J) dissected corollas, (K) abaxial lip, (L) habitat and (M) stamens and pistil.