Abstract
The two species with lobed leaves, viz., Petrocosmea henryi and P. weiyigangii are very distinctive from other species of Petrocosmea. Here, the third species with lobed leaves, named Petrocosmea panzhouensis, from western Guizhou, China, is described. The new species is most similar to P. henryi on shape of leaf blade margin and straight filaments, but it is distinguished from the latter by shape of bracts, and shape and length of anthers. The new taxon is assessed as “Data Deficient” (DD), according to the IUCN standards.
References
<p>Craib, W.G. (1918) Gesneracearum novitates nonnullae. Notes from the Royal Botanic Garden, Edinburgh 10: 211–219.<br>Global Plants (2022) Global Plants. JSTOR. Available at: https://plants.jstor.org/ (accessed 12 May 2022).<br>GRC (2022) The RBGE Gesneriaceae Resource Centre. Royal Botanic Garden, Edinburgh, UK. Available at: https://padme.rbge.org.uk/grc/ (accessed 5 May 2022 and 5 September 2022).<br>Hance, H.F. (1875) Diagnosis of two new Chinese Ferns. Journal of Botany, British and Foreign 13: 197.<br>Hemsley, W.B. (1899) Petrocosmea minor Hemsl. In: William, T. (ed.) Hooker’s icones plantarum Vol. 26. Dulau & Co, London, Plate 2600.<br>IPNI (2022) International Plant Names Index. The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries and Australian National Botanic Gardens. Available at: https://www.ipni.org/ (accessed 10 May 2022)<br>IUCN (2012) IUCN Red List Categories and Criteria, Version 3.1. Prepared by the IUCN Species Survival Commission. Available at: https://portals.iucn.org/library/node/10315 (accessed 13 May 2022)<br>IUCN (2022) Guidelines for Using the IUCN Red List Categories and Criteria, Version 15. Prepared by the Standards and Petitions Committee of the IUCN Species Survival Commission. Available at: https://www.iucnredlist.org/resources/redlistguidelines (accessed 13 May 2022)<br>Jiang, H., Han, M.Q., Dong, Z., Han, Z.D. & Liu, Y. (2020) Two new species of Petrocosmea (Gesneriaceae) from Yunnan, China. Nordic Journal of Botany 12: e02847. https://doi.org/10.1111/njb.02847<br>Oliver, D. (1887) Hooker’s icones plantarum Vol. 18. Longman, London, Plate 1716.<br>POWO (2022) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew, UK. Available at: http://powo.science.kew.org/ (accessed 10 May 2022)<br>Qiu, Z.J., Yuan, Z.L., Li, Z.Y. & Wang, Y.Z. (2011) Confirmation of a natural hybrid species in Petrocosmea (Gesneriaceae) based on molecular and morphological evidence. Journal of Systematics and Evolution 49: 449–463. https://doi.org/10.1111/j.1759-6831.2011.00151.x<br>Qiu, Z.J. & Liu, Z.Y. (2015) Plants of Petrocosmea in China. Science Publishing House, Beijing, pp. 1–233.<br>Shaw, J.M.H. (2019) Petrocosmea thermopuncta, a new identity for cultivated Petrocosmea ‘grandiflora’ Gesneriaceae. Curtis’s Botanical Magazine 36: 134–143. https://doi.org/10.1111/curt.12283<br>Shaw, J.M.H. (2021) Petrocosmea rotundifolia, a new identity for plants cultivated as Petrocosmea ‘minor’ Gesneriaceae. Curtis’s Botanical Magazine 38: 115–125. https://doi.org/10.1111/curt.12379<br>Wang, W.T. (1985) The second revision of the genus Petrocosmea (Gesneriaceae). Yunnan Zhi Wu Yan Jiu 7: 49–68.<br>Wang, W.T., Pan, K.Y., Li, Z.Y., Weitzman, A.L. & Skog, L.E. (1998) Petrocosmea. In: Wu, Z.Y. & Raven, P.H. (eds.) Flora of China Vol. 18 (Gesneriaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, pp. 302–308.<br>Wang, H.C., Zhang, L.B. & He, Z.R. (2013) Petrocosmea melanophthalma, a new species in section Deianthera (Gesneriaceae) from Yunnan, China. Novon 22: 486–490. https://doi.org/10.3417/2011035<br>Weber, A., Clark, J.L. & Möller, M. (2013) A new formal classification of Gesneriaceae. Selbyana 31: 68–94.<br>Wen, F. (2019) Petrocosmea weiyigangii (Gesneriaceae), a new species from a limestone cave in southern China. Gardens’ Bulletin (Singapore) 71: 175–183. https://doi.org/10.26492/gbs71(1).2019-11<br>Wen, F., Wei, Y.G., Fu, L.F., Xin, Z.B. & Ge, Y.Z. (2022) The checklist of Gesneriaceae in China. The Gesneriad Conservation Center of China. Available from: http://gccc.gxib.cn/cn/about-68.aspx (accessed 10 May 2022)</p>