No.27 Bo Pan, Guang-Da Tang, Truong Van Do, Stephen Maciejewski, Chong-Lang Deng & Fang Wen

Oreocharis tetrapterus (Gesneriaceae), a new species from East Guangxi, China

PhytoKeys 2019(131): 83–89

Abstract

    A new species, Oreocharis tetrapterus F.Wen, B.Pan & T.V.Do (Gesneriaceae) from Gupo Mountain area, Hezhou city, Guangxi Zhuangzu Autonomous Region, China, is described and illustrated. The new species has a zygomorphic tetramerous corolla with two adaxial and two abaxial lobes and two fertile stamens in the posterior position, making this a unique combination of floral characteristics in the expanded Oreocharis.

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Figure 1. Oreocharis tetrapterus F.Wen, B.Pan & T.V.Do sp. nov. A habit B lateral view of flower C adaxial surfaces of calyx lobes D opened corolla for showing the two fertile stamens in posterior position E pistil with disc, sepals removed F stigma G anthers in side view. Drawn by Wen-Hong Lin from the holotype.

Figure 2. Oreocharis tetrapterus F.Wen, B.Pan & T.V.Do sp. nov. in its natural habitat A habitat B flowering plant C plant with flowering cymes D frontal view of corolla E lateral view of corolla F top view of corolla. Photographed by Bo Pan and Fang Wen, charted by Wen-Hua Xu.

Figure 3. Oreocharis tetrapterus F.Wen, B.Pan & T.V.Do sp. nov. A lateral view of flower B top view of flower C lateral view of corolla and pistil and calyx lobes D adaxial surface of calyx lobes E abaxial surface of calyx lobes F pistil, sepals removed G opened corolla for showing stamens in posterior position H anthers, abaxial view I adaxial leaf surface J abaxial leaf surface K peduncle indumentum. Photographed by Fang Wen and Bo Pan in the field, charted by Wen-Hua Xu.

Figure 4. Some species in Oreocharis with typically four corolla lobes A Oreocharis tetrapterus F.Wen, B.Pan & T.V.Do sp. nov. B O. sinensis (Oliv.) Mich.Möller & A.Weber (1 Lateral view of flowering cyme 2 Frontal view of flowering cyme) D O. esquirolii Léveillé (1 Corolla with four lobes and four stamens 2 Corolla with five lobes and five stamens). Photographed by Fang Wen and Bo Pan, charted by Wen-Hua Xu.