Abstract
A new fern species, Polystichum jinpingense, a member of P. subg. Haplopolystichum sect. Haplopolystichum, is described and illustrated from southeastern Yunnan, China. Polystichum jinpingense is most similar to P. subacutidens in plant size and having numerous pinnae, but the former has thinner (0.7–0.9 mm in diam.) rachis, oblong pinnae, pinna margins undulate, and pinna apex cuspidate, whereas the latter has thicker (1.1–1.4 mm in diam.) rachis, triangular pinnae, pinna margins serrate, and pinna apex acuminate. Polystichum jinpingense has an extremely narrow distribution and is classified as Critically Endangered (CR) following IUCN Red List Criteria.
References
Chen, W.-H., Zhang, Y.-M., He, D.-M., Li, Y.-L. & Shui, Y.-M. (2020) Four new species of Oreocharis (Gesneriaceae) in Yunnan Province, China. PhytoKeys 157: 83–99. https://doi.org/10.3897/phytokeys.157.32284
Han, M.-Q., Liu, Y. & Zhang, L.-B. (2018) Eight new species of Polystichum (subg. Haplopolystichum; Dryopteridaceae) from limestone caves in Guangdong and Yunnan, China, with reference to species diversity in the karst terrains at high elevations in subtropical areas. Phytotaxa 365: 145–168. https://doi.org/10.11646/phytotaxa.365.2.3
IUCN. (2017) The IUCN Red List of Threatened Species. Version 2017-1. Available from: www.iucnredlist.org (accessed 10 March 2022)
Kung, H.-S., Chu, W.-M., He, Z.-R. & Zhang, L.-B. (2001) Polystichum. In: Kung, H.-S. (Ed.) Flora Reipublicae Popularis Sinicae. vol. 5 (2). Beijing, Science Press. pp. 1–246.
Li, X.-W. (1996) Floristic statistics and analyses of seed plants from China. Acta Botanica Yunnanica 18: 363–384.
Lu, N.T., Zhang, L. & Zhang, L.-B. (2014) Ten new records of Polystichum (Dryopteridaceae) for Vietnam and lectotypification of Polystichum atroviridissimum and P. fimbriatum. Phytotaxa 164: 115–123. https://doi.org/10.11646/phytotaxa.164.2.5
Roth, A.W. (1800) Tentamen Florae Germanicae, vol. 3. Gleditsch, Leipzig, 578 pp.
Tagawa, M. (1940) Polystichum of Japan, Korea, and Formosa I. Acta Phytotaxonomica Geobotanica 9: 119–138.
Wu, S.-G., Xiang, J.-Y. & Pan, K.-L. (2005) Some new records of ferns from Vietnam (1). Acta Botanica Yunnnanica 27: 249–252.
Wu, S.-G., Xiang, J.-Y. & Pan, K.-L. (2006) Some new records of ferns from Vietnam (2). Acta Botanica Yunnnanica 28: 17–18. https://doi.org/10.3724/SP.J.1143.2012.11100
Wu, S.-G., Xiang, J.-Y., Pan, K.-L. & Souliya, O. (2012) Some new records of ferns from Vietnam and Laos (3) Pteris (Pteridaceae). Plant Diversity & Resources 28: 17–18.
Xiang, L.-L. (1994) A taxonomic study on the Polystichum sect. Holopolystichum from Yunnan. Acta Phytotaxonomica Sinica 32: 258–267.
Zhang, L.-B. & Barrington, D.S. (2013) Polystichum. In: Wu, Z.-Y., Raven, P.H. & Hong, D.-Y. (Eds.) Flora of China, vols. 2–3. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 629–713.
Zhang, M.-G., Zhou, Z.-K., Chen, W.-Y., Slik, J.W.F., Cannon, C.H. & Raes, N. (2012) Using species distribution modeling to improve conservation and land use planning of Yunnan, China. Biological Conservation 153: 257–264. https://doi.org/10.1016/j.biocon.2012.04.023
Han, M.-Q., Liu, Y. & Zhang, L.-B. (2018) Eight new species of Polystichum (subg. Haplopolystichum; Dryopteridaceae) from limestone caves in Guangdong and Yunnan, China, with reference to species diversity in the karst terrains at high elevations in subtropical areas. Phytotaxa 365: 145–168. https://doi.org/10.11646/phytotaxa.365.2.3
IUCN. (2017) The IUCN Red List of Threatened Species. Version 2017-1. Available from: www.iucnredlist.org (accessed 10 March 2022)
Kung, H.-S., Chu, W.-M., He, Z.-R. & Zhang, L.-B. (2001) Polystichum. In: Kung, H.-S. (Ed.) Flora Reipublicae Popularis Sinicae. vol. 5 (2). Beijing, Science Press. pp. 1–246.
Li, X.-W. (1996) Floristic statistics and analyses of seed plants from China. Acta Botanica Yunnanica 18: 363–384.
Lu, N.T., Zhang, L. & Zhang, L.-B. (2014) Ten new records of Polystichum (Dryopteridaceae) for Vietnam and lectotypification of Polystichum atroviridissimum and P. fimbriatum. Phytotaxa 164: 115–123. https://doi.org/10.11646/phytotaxa.164.2.5
Roth, A.W. (1800) Tentamen Florae Germanicae, vol. 3. Gleditsch, Leipzig, 578 pp.
Tagawa, M. (1940) Polystichum of Japan, Korea, and Formosa I. Acta Phytotaxonomica Geobotanica 9: 119–138.
Wu, S.-G., Xiang, J.-Y. & Pan, K.-L. (2005) Some new records of ferns from Vietnam (1). Acta Botanica Yunnnanica 27: 249–252.
Wu, S.-G., Xiang, J.-Y. & Pan, K.-L. (2006) Some new records of ferns from Vietnam (2). Acta Botanica Yunnnanica 28: 17–18. https://doi.org/10.3724/SP.J.1143.2012.11100
Wu, S.-G., Xiang, J.-Y., Pan, K.-L. & Souliya, O. (2012) Some new records of ferns from Vietnam and Laos (3) Pteris (Pteridaceae). Plant Diversity & Resources 28: 17–18.
Xiang, L.-L. (1994) A taxonomic study on the Polystichum sect. Holopolystichum from Yunnan. Acta Phytotaxonomica Sinica 32: 258–267.
Zhang, L.-B. & Barrington, D.S. (2013) Polystichum. In: Wu, Z.-Y., Raven, P.H. & Hong, D.-Y. (Eds.) Flora of China, vols. 2–3. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 629–713.
Zhang, M.-G., Zhou, Z.-K., Chen, W.-Y., Slik, J.W.F., Cannon, C.H. & Raes, N. (2012) Using species distribution modeling to improve conservation and land use planning of Yunnan, China. Biological Conservation 153: 257–264. https://doi.org/10.1016/j.biocon.2012.04.023