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| Petrocosmea adenophora Z.J.Huang & Z.B.Xin, in Huang & Xin, 2021. DOI: 10.1111/njb.02944 |
Abstract
A new species, Petrocosmea adenophora Z.J.Huang & Z.B.Xin, from SE Yunnan, China, is described here. It closely resembles P. iodioides Hemsl. in leaf blade shape and corolla type, but differs from the latter by some vegetative and generative characters, e.g. densely golden-brown glandular puberulent all over the plant. We found only one population with no more than 200 mature individuals at the type locality. This species is provisionally assessed as data deficient (DD), following the IUCN Red List Categories and Criteria, because more surveys are needed.
Keywords: Didymocarpoideae, Flora of Yunnan, karst, limestone cave, taxonomy
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| Petrocosmea adenophora sp. nov. (a) habit, (b) habitat, (c) closer look of plants in habitat, (d) leaf adaxial surface, (e) leaf abaxial surface, (f) front view of the corolla, (g) side view of the corolla, (h) top view of the corolla, (i) opened corolla, pistil and stamens, (j) dissected calyx, showing the three adaxial lobes (top) and two abaxial lobes (bottom), (k) pistil, (l) stamens; (m) indumentum on the petiole and leaf blade, (n) cyme. Photos: Zhang-Jie Huang. |
Petrocosmea adenophora Z.J.Huang & Z.B.Xin, sp. nov.
A species morphologically similar to P. iodioides (Fig. 2), but differing in its leaf blades densely villous and golden-brown glandular puberulent at both surfaces, lateral veins adaxially inconspicuous (versus adaxially hirsute, abaxially velutinous, lateral veins adaxially impressed), calyx lobes unequal (the three adaxial lobes smaller, the two abaxial lobes larger) and densely villous and golden-brown glandular puberulent outside (versus equal, villous outside), corolla glandular puberulent outside (versus sparsely eglandular puberulent outside), and filaments densely golden-brown glandular puberulent (versus eglandular puberulent).
Distribution and habitat: The new species is only known from Malipo County, Yunnan Province, China. This species grows on stalactites of the entrance of a limestone cave, at an altitude ca 1275 m a.s.l
Etymology: The epithet ‘adenophora' is derived from Ancient Greek ‘ἀδήν' (adḗn, gland) and ‘φέρω' (phérō, to bring, bear, carry), meaning that the sticky golden-brown glandular puberulent all over the plant.
Vernacular name: Chinese mandarin: Jīn xiàn shí hú dié (金腺石蝴蝶).
Zhang-Jie Huang and Zi-Bing Xin. 2021. Petrocosmea adenophora (Gesneriaceae), A New Species from Yunnan, China. Nordic Journal of Botany. 39(3); DOI: 10.1111/njb.02944
