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| Petrocosmea hsiwenii Lei Cai, J.D.Ya & J.Cai, in Cai, Ya, Yu, Liang, Wen & Cai, 2022. 錫文石蝴蝶 || taiwania.ntu.edu.tw/abstract/1879 |
Abstract
Petrocosmea hsiwenii Lei Cai, J.D.Ya & J.Cai, a new species of Gesneriaceae from Jinping County, southeastern Yunnan, China, is described and illustrated. The new species is morphologically similar to P. rosettifolia C.Y.Wu ex H.W.Li in the shape, color and structure of the flowers, but it can be easily distinguished by the shape of the leaf blade, the number of lateral veins, the indumentum characters of the leaves, stem, anther and pistil, as well as the type of inflorescence. The morphological relationship between this and similar species is discussed, and a detailed descriptions is provided, together with colored photographs, and information on the distribution. We propose that P. hsiwenii be assigned an IUCN conservation status of endangered (EN).
KEY WORDS: Flora of Yunnan, Hsi-Wen Li, karst region, new taxa, Petrocosmea rhombifolia, Petrocosmea rosettifolia.
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| Petrocosmea hsiwenii Lei Cai, J.D.Ya & J.Cai. A. Habitat. B. Adaxial surface of leaf blade. C. Abaxial surface of leaf blade. D. Inflorescences. E. Young fruits. F. Pistil with calyx lobes. G. Dissected flower showing stamens and staminodes. H. Frontal view of a flower. I. Lateral view of a flower. J. Rear view of a flower. K. Dissected flower showing the internal structure. Photographs by Ji-Dong Ya (A) and Lei Cai (B–K). |
Petrocosmea hsiwenii Lei Cai, J.D.Ya & J.Cai, sp. nov.
錫文石蝴蝶
Diagnosis: Petrocosmea hsiwenii morphologically resembles P. rosettifolia in the shape, color and structure of the flowers, but can be easily distinguished from the latter by the following characters. Most plant parts covered with brownish-red jointed pilose and villous indumentum (vs. pubescent and puberulent indumentum), petiole to 17.5 cm long (vs. to 4 cm long); leaf blades ovate, elliptic to oblong, 1.8–15.3 × 1.2–8.2 cm, base cordate or circular, apex obtuse, margin serrate (vs. broadly ovate to orbicular or broadly elliptic, 0.5–4 × 0.4–3 cm, base broadly cuneate to nearly rounded, apex obtuse to broadly acute, margin entire to crenulate-serrulate toward apex); throat white (vs. throat blueish-purple); anther covered with golden capitate-glandular puberulent hairs (vs. glabrous); ovary densely glandular puberulent (vs. puberulent); cyme 2–4- flowered (vs. inflorescence 1-flowered).
Etymology: The specific epithet is in memory of Prof. Li, Hsi-Wen (李錫文, 1931–2021) from the Kunming Institute of Botany, Chinese Academy of Sciences for his contribution to the taxonomy of the Gesneriaceae family in the Flora of Yunnan, China.
Distribution and Ecology: Petrocosmea hsiwenii is currently known only from the type locality (Tongchang Town, Jinping County, Yunnan, China) in the karst region comprising three adjacent populations. This species grows on the surfaces or in the limestone crevices under limestone forests. It is often associated with the following herbs: Begonia sp., Clarkella nana, Elatostema sp., Cyrtomium sp. and other fern species.
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| Petrocosmea rosettifolia C.Y.Wu ex H.W.Li A. Habitat. B & C. Inflorescences. D. Adaxial surface of leaf blade. E. Abaxial surface of leaf blade. F. Frontal view of flower. G. Lateral view of flowers. H. Pistil with calyx lobes. I. Dissected flower showing stamens and staminodes. J. Adaxial view of anthers. K. Abaxial view of anthers. Photographs by Cheng Liu (A & B) and Lei Cai (C–K). |
Lei Cai, Ji-Dong Ya, Zhi-Yong Yu, Zong-Li Liang, Fang Wen and Jie Cai. 2022. Petrocosmea hsiwenii (Gesneriaceae), A New Species from Yunnan, China. Taiwania. 67(4); 591-594.
