Abstract
Eight new fern species of Polystichum subg. Haplopolystichum (Dryopteridaceae) are described and illustrated from Guangdong and Yunnan provinces, southern and southwestern China, respectively. These eight species include P. deltatum, P. gejiuense, P. malipoense, P. oblongipinnarum, P. pingbianense, P. rectum, and P. superum from Yunnan, and P. hanmengqii from Guangdong. Four of the eight species are described from high elevations (around 2000 m) demonstrating that the limestone areas at high elevations in subtropical areas are species-rich and deserve special conservation attention. All eight species are so far known only from single caves; they are all classified as Critically Endangered (CR) following IUCN Red List criteria.
References
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Zhou, H.-G., Li, H. & Huang, Y.-Y. (1996) New species of pteridophyte from limestone area of Guangxi. Guihaia 16: 203–289.
https://doi.org/10.3417/2015033
Aedo, C. (2017) Taxonomic revision of Geranium sect. Ruberta and Unguiculata (Geraniaceae). Annals of the Missouri Botanical Garden 102: 409–465.
https://doi.org/10.3417/D-16-00016A
Alejandro, G.J.D., Meve, U. & Liede-Schumann, S. (2016) A taxonomic revision of Philippine Mussaenda (Rubiaceae, Mussaendeae). Annals of the Missouri Botanical Garden 101: 457–524.
https://doi.org/10.3417/2010089
Don, D. (1839) VIII. Description of two new genera of the natural family of plants called Coniferae. Transactions of the Linnean Society of London 18: 161–177.
https://doi.org/10.1111/j.1095-8339.1838.tb00169.x
Duan, Y.-F., Hennequin, S., Rouhan, G., Bassuner, B. & Zhang, L.-B. (2017) A taxonomic revision of the fern genus Ctenitis (Dryopteridaceae) from Africa and the western Indian Ocean. Annals of the Missouri Botanical Garden 102: 3–86.
https://doi.org/10.3417/2016024
Han, M.-Q., Liu, Y. & Zhang, L.-B. (2016) Seven new species of Polystichum (subg. Haplopolystichum; Dryopteridaceae) from southern China. Phytotaxa 280 (3): 201–221.
https://doi.org/10.11646/phytotaxa.280.3.1
IUCN (2015) The IUCN Red List of Threatened Species, version 2015-3. IUCN Red List Unit, Cambridge U.K. Available from: <a href="http://www.iucnredlist.org/documents/RedListGuidelines.pdf"><span style="text-decoration: underline;">http://www.iucnredlist.org/documents/RedListGuidelines.pdf</span></a> (accessed 15 August 2018)
Kolanowska, M. & Szlachetko, D.L. (2017) Synopsis of the genus Pterichis (Orchidaceae) in Colombia. Annals of the Missouri Botanical Garden 102: 87–124.
https://doi.org/10.3417/2013032
Kung, H.-S., Chu, W.-M., He, Z.-R. & Zhang, L.-B. (2001) Polystichum. In: Wu, C.-Y. (Ed.) Flora of reipublicae popularis sinicae. Volume 5(2), edited by Kung, H.-S. Beijing, Science Press, pp. 1–246.
Linnaeus, C. von f. (1782) Supplementum Plantarum. Orphanotrophe, Brunswig, 468 pp.
Lucas, E., Wilson, C.E., Lima, E.F., Sobral, M. & Matsumoto, K. (2016) A conspectus of Myrcia sect. Aulomyrcia (Myrtaceae). Annals of the Missouri Botanical Garden 101: 648–698.
https://doi.org/10.3417/2014015
Mello-Silva, R. & Sasaki, D. (2016) Revision of the Brazilian hemispheric ovary clade of Vellozia (Velloziaceae) with the new V. religiosa. Annals of the Missouri Botanical Garden 101: 553–567.
https://doi.org/10.3417/2011063
Morales, J.F., Endress, M.E. & Liede-Schumann, S. (2017) Systematics of Prestonia (Apocynaceae: Apocynoids: Echiteae) 80 years after Woodson. Annals of the Missouri Botanical Garden 102: 520–541.
https://doi.org/10.3417/D-17-00002A
O’Leary, N, Lu-Irving, P., Moroni, P. & Siedo, S. (2016) Taxonomic revision of Aloysia (Verbenaceae, Lantaneae) in South America. Annals of the Missouri Botanical Garden 101: 568–609.
https://doi.org/10.3417/2013015
O’Leary, N. & Thode, V. (2016) The genus Glandularia (Verbenaceae) in Brazil. Annals of the Missouri Botanical Garden 101: 699–749.
https://doi.org/10.3417/2014008
Roth, A.W. (1800) Tentamen Florae Germanicae, vol. 3. Gleditsch, Leipzig, 578 pp.
Szlachetko, D.L. & Kolanowska, M. (2017) Synopsis of the genus Ocampoa (Orchidaceae). Annals of the Missouri Botanical Garden 102: 710–729.
https://doi.org/10.3417/2016031
Tagawa, M. (1940) Polystichum of Japan, Korea, and Formosa I. Acta Phytotaxonomica Geobotanica 9: 119–138.
Tang, G.-D., Huang, L., Li, J.-Y., He, Z.-L. & Zhang, L.-B. (2017). Polystichum hastipinnum (subg. Haplopolystichum; Dryopteridaceae), a new cave fern from Guangdong, China. Phytotaxa 309 (1): 66–72.
https://doi.org/10.11646/phytotaxa.309.1.6
Zhang, L., Gao, X.-F. & Zhang, L.-B. (2013) Polystichum hainanicola (Dryopteridaceae), a new fern species from Hainan Island, China. Phytotaxa 85 (1): 9–14.
https://doi.org/10.11646/phytotaxa.85.1.2
Zhang, L.-B. (2012) Taxonomic and nomenclatural notes on the fern genus Polystichum (Dryopteridaceae) from China. Phytotaxa 60 (1): 57–60.
https://doi.org/10.11646/phytotaxa.60.1.8
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, L.-B. & He, H. (2009) Polystichum peishanii (sect. Haplopolystichum, Dryopteridaceae): A new fern species from limestone area in Guizhou, China. Botanical Studies 50: 101–106.
Zhang, L.-B. & He, H. (2011) Polystichum fengshanense, sp. nov. (sect. Haplopolystichum, Dryopteridaceae) from karst caves in Guangxi, China based on morphological, palynological, and molecular evidence. Systematic Botany 36: 854–861.
https://doi.org/10.1600/036364411X604877
Zhou, H.-G., Li, H. & Huang, Y.-Y. (1996) New species of pteridophyte from limestone area of Guangxi. Guihaia 16: 203–289.