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Type: Article
Published: 2023-08-03
Page range: 85-94
Abstract views: 94
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Three new species and one new record of the fern genus Polystichum (Dryopteridaceae) from Vietnam

Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
Faculty of Biology, VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam
Department of Botany, Hanoi Pedagogical University 2, 32 Nguyen Van Linh, Xuan Hoa, Phuc Yen, Vietnam
Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, Missouri 63110, U.S.A; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China
Pteridophytes Caves limestone habitat new discoveries


Three new species, Polystichum pseudodangii, P. xuansonense, and P. unicum, and a new record, P. omeiense, are described and reported here, respectively. These four species were found in limestone habitat in northern Vietnam, with the first species collected from Phu Tho Province and the rest from Ha Giang Province. Detailed descriptions, images, taxonomic notes, type information, examined specimens, distribution, and habitat are provided for the new species and new record.


  1. Baker, J.G. (1888) On two recent collections of ferns from Western China. Journal of Botany, British and Foreign 26 (7): 225–231.
  2. Ching, R.C. (1949) The studies of Chinese ferns – XXXV. Bulletin of the Fan Memorial Institute of Biology 1 (3): 267–317.
  3. Ching, R.C. (1958) Icones Filicarum Sinicarum, vol. 5. The Metropolitan Museum of Natural History, Academia Sinica, Nanking (Nanjing) and the Fan Memorial Institute of Biology, Peiping (Beijing), 102 pp.
  4. Christ, H. & Billet, A. (1898) Note sur la flore du Haut-Tonkin. - Les cryptogames vasculaires par. Bulletin Scientifique de la France et de la Belgique 28: 255–278.
  5. Christensen, C. (1906) Index filicum. H. Hagerup, Copenhagen. 745 pp.
  6. Diels, L. (1900) Die Flora von Central-China. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 29 (2): 169–320.
  7. 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 (2): 145–168.
  8. Kung, H.-S., Chu, W.-M., He, Z.-R. & Zhang, L.-B. (2001) Polystichum. In: Wu, C.-Y. (Ed.) Flora Reipublicae Popularis Sinicae, vol. 5 (2). Science Press, Beijing, pp. 1–246.
  9. Lu, T.N., Gao, X.-F. & Zhang, L.-B. (2017) Proposal to conserve the name Polystichum omeiense against P. caruifolium (Dryopteridaceae). Taxon 66 (6): 1468–1469.
  10. Lu, T.N., Wei, H.-J., Vuong, L.D., Toan, L.C., Zhang, L.-B. & Zhang, L. (2023) Cyrtomium calcis sp. nov. and six new records of the shield fern family (Dryopteridaceae) from Vietnam. Phytotaxa 583: 015–026.
  11. Lu, T.N., Zhang, L. & Zhang, L.-B. (2014a) Ten new records of Polystichum (Dryopteridaceae) for Vietnam and lectotypification of Polystichum atroviridissimum and P. fimbriatum. Phytotaxa 164 (2): 115–123.
  12. Lu, T.N., Zhang, L. & Zhang, L.-B. (2014b) Polystichum hagiangense (subg. Haplopolystichum; Dryopteridaceae), a new fern species from Ha Giang Province, northern Vietnam. Phytotaxa 175 (5): 293–297.
  13. Lu, T.N., Zhang, L., Nguyen, T.D. & Zhang, L.-B. (2015) Polystichum quangbinhense sp. nov. (subg. Haplopolystichum; Dryopteridaceae), the southernmost cave species of Polystichum from central Vietnam. Phytotaxa 283 (3): 295–299.
  14. Lu, T.N., Zhang, L., Zhou, X.-M., Gao, X.-F. & Zhang, L.-B. (2018) Three new species of the fern genus Arachniodes (Dryopteridaceae) from Vietnam. Phytotaxa 376: 126–132. http:s//
  15. Pham, H.H. (1999) An illustrated flora of Vietnam, vol. 1. Nha Xuat Ban Tre, Hanoi, 618 pp.
  16. Phan, K.L. (2001) Psilotophyta, Equisetophyta and Polypodiophyta. In: Nguyen, T.B. (Ed.) Checklist of plant species of Vietnam 1. Agriculture Publishing House, Hanoi, pp. 951–955.
  17. Phan, K.L. (2010) The updated Checklist of the Fern Flora of Vietnam following the classification scheme of A. Smith et al. (2006). Journal of Fairylake Botanical Garden 9: 1–13.
  18. PPG I (2016) A community-derived classification for extant lycophytes and ferns. Journal of Systematics & Evolution 54: 563–603.
  19. Roth, A.W. (1800) Tentamen Florae Germanicae 3. Gleditsch, Leipzig, 578 pp.
  20. Sprengel, C.P.J. (1827) Systema vegetabilium, editio decima sexta 4 (1). Dieteriach, Göttingen, 410 pp.
  21. Tagawa, M. (1940) Polystichum of Japan, Korea, and Formosa I. Acta Phytotaxononica Geobotanica 9: 119–138.
  22. Tardieu-Blot, M.-L. & Christensen, C. (1941) Cryptogames vasculaires. In: Lecomte, H. & Gagnepain, F. (Eds.) Flore générale de l’IndoChine 7. Masson & Cie, Paris, 596 pp.
  23. Wang, B., Sun, Q.-W., Wang, Z.-H., Chen, C.-L., Xu, W.-F. & Zhang, L.-B. (2022) Polystichum suiyangense (sect. Sphaenopolystichum, Dryopteridaceae), a new fern from Guizhou, China. Phytotaxa 567 (1): 093–099.
  24. Wang, P.S. & Wang, X.Y. (2001) Pteridophyte flora of Guizhou. Guangxi Science & Technology Press, Guiyang, 727 pp.
  25. Xiang, L.-L. (1994) A taxonomic study of the genus Polystichum Roth section Haplopolystichum Tagawa from Yunnan. Acta Phytaxonomica Sinica 32: 258–267.
  26. Xu, K.-W., Zhang, L., Lu, T.N., Zhou, X.-M., He, H., Luong, T.T., Knapp, R., Liao, W.-B. & Zhang, L.-B. (2018a) Nine new species of Hymenasplenium (Aspleniaceae) from Asia. Phytotaxa 358 (1): 001–025.
  27. Xu, K.-W., Zhang, L., Lu, T.N. & Zhang, L.-B. (2018b) Asplenium serratifolium (Aspleniaceae), a new fern species from Central Vietnam based on morphological and molecular evidence. American Fern Journal 108 (3): 65–75.
  28. Xu, K.-W., Lu, T.N, Zhou, X.-M., Zhang, L. & Zhang, L.-B. (2021) Asplenium quangbinhense sp. nov. and three new records of Asplenium (Aspleniaceae) from Vietnam. Phytotaxa 521 (2): 113–120.
  29. Ye, Z.-Y., Lu, T.N., Zhang, L., Zhou, X.-M. & Zhang, L.-B. (2020) Selaginella coriaceifolia (sect. Heterostachys; Selaginellaceae), a new lycophyte species from central Vietnam. Phytotaxa 453 (2): 121–129.
  30. Zhang, L., Lu, T.N. & Zhang, L.-B. (2015a) Leptochilus oblongus (Polypodiaceae), a new fern species from northern Vietnam. Phytotaxa 234 (2): 195.
  31. Zhang, L., Lu, T.N. & Zhang, L.-B. (2015b) Pteris langsonensis (Pteridaceae), a new brake fern species from Lang Son Province, northern Vietnam. Phytotaxa 238 (3): 283–287.
  32. Zhang, L., Lu, T.N., Zhou, X.-M. & Zhang, L.-B. (2017) Three new species of the fern genus Pteridrys (Tectariaceae) from Vietnam. Phytotaxa 324 (3): 279–287.
  33. Zhang, L-B. (2012) Taxonomic and nomenclatural notes on the fern genus Polystichum (Dryopteridaceae) in China. Phytotaxa 60 (1): 57–60.
  34. 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.