Abstract
A new fern species, Hypodematium eglandulosum, is described and illustrated from southern China and Southeast Asia, and a new combination is made, H. chrysolepis, from Africa. Hypodematium eglandulosum is distinguished from its similar species by plants eglandular, leaves 3-pinnatifid, and stipes upward sparsely covered with acicular hairs or nearly glabrous. The description and photographs of H. eglandulosum are provided. Aspidium chrysolepis is currently treated as a synonym of H. crenatum, but it should be recognized.
References
Ching, R.-C. (1963) A reclassification of the family Thelypteridaceae from the mainland of Asia. Acta Phytotaxonomica Sinica 8: 289–335.
Ching, R.-C. (1975) Two new fern families. Acta Phytotaxonomica Sinica 13: 96–98.
Ching, R.-C. (1975) Hypodematium Kunze. Flora Jiangsuensis, Vol. 1. Jiangsu: Jiangsu People’s Publishing House, pp. 49, 465.
Fan, X.-P., Zhang, L., Ralf, K., He, H., Gao, X.-F. & Zhang, L.-B. (2021) Hypodematium shingii sp. nov. (Hypodematiaceae; Polypodiales): Replacing the misapplied “H. crenatum”, a widespread fern from Asia. Phytotaxa 482 (1): 87–92. https://doi.org/10.11646/phytotaxa.482.1.10
Fan, X.-P., Gao, X.-F. & Zhang, L.-B. (2020) Taxonomy of the fern genus Hypodematium (Pteridophyta: Hypodematiaceae) from Japan. Phytotaxa 455 (2): 161–166. https://doi.org/10.11646/phytotaxa.455.2.7
Fan, X.-P., Lu, T.N., Li, C.-X., Knapp, R., He, H., Zhou, X.-M., Zhang, L., Gao, X.-F. & Zhang, L.-B. (in press). Phylogeny, biogeography, and character evolution in the fern family Hypodematiaceae. Molecular Phylogenetics and Evolution.
Fée, A.L.A. (1855) Iconographie des espèces nouvelles décrites ou énumérées dans le genera filicum et révision des publications antérieures relatives à la famille des fougères. Mémoires sur les Familles des Fougères, Vol. 7. V. Berger- Levrault, Strasbourg,107 pp. https://doi.org/10.5962/bhl.title.116435
Forsskål, P. (1775) Flora Aegyptiaco-Arabica. Möller, Havniæ (Copenhagen). 219 pp.
Fraser-Jenkins, C.R. (2008) Taxonomic revision of three hundred Indian subcontinental Pteridophytes: with a revised census list; a new picture of fern-taxonomy and nomenclature in the Indian subcontinent. Bishen Singh Mahendra Pal Singh. Dehra Dun, India, 685 pp.
Hassler, M. (2004–2021) World Ferns. Synonymic checklist and distribution of ferns and lycophytes of the world. Version 12.1. Available from: www.worldplants.de/ferns/ (last update 13 March 2021)
Iwatsuki, K. (1964) On Hypodematium Kunze. Acta Phytotaxonomica et Geobotanica 21: 43–54.
Kuhn, F.A.M. & Decken, C.L. von der (1879) Cryptogamae vasculares. Ordo II. Polypodiaceae. R. Br. 30. Hypodematium Kze. Reisen in Ost Afrika 3 (3): 36–37.
Kunze, G. (1833) Hypodematium, eine neue Farngattung. Flora 16: 689–691.
Lee, C.S., Lee, K., Yeau, S.H. & Chung, K.S. (2018) Phylogenetic study of the fern genus Hypodematium (Hypodematiaceae), focusing on Korean native taxa. Korean Journal of Plant Taxonomy 48 (3): 163–171. https://doi.org/10.11110/kjpt.2018.48.3.163
Li, X.-J., Li, J.-X. & Meng, F.-Y. (2018) A new species of Hypodematium (Hypodematiaceae) from china. Phytokeys 92: 37–44. https://doi.org/10.3897/phytokeys.92.21815
Liu, H.-M., Jiang, R.-H., Guo, J., Hovenkamp, P., Perrie, L.R., Shepherd, L., Hennequin, S. & Schneider, H. (2013) Towards a phylogenetic classification of the climbing fern genus Arthropteris. Taxon 62: 688–700. https://doi.org/10.12705/624.26
Loyal, D.S. (1972) Morphology of Hypodematium crenatum (forsk.) kuhn: comments on a recent paper. American Fern Journal 62 (3): 88–92. https://doi.org/10.2307/1546441
Pichi Sermolli, R.E.G. (1977) Tentamen Pteridophytorum genera in taxonomicum ordinem redigendi. Webbia 31: 313–512. https://doi.org/10.1080/00837792.1977.10670077
PPG I. (2016) A community-derived classification for extant lycophytes and ferns. Journal of Systematics and Evolution 54: 563–603. https://doi.org/10.1111/jse.12229
Schuettpelz, E. & Pryer, K.M. (2007) Fern phylogeny inferred from 400 leptosporangiate species and three plastid genes. Taxon 56: 1037–1050. https://doi.org/10.2307/25065903
Shing, K.S., Chiu, P.S. & Yao, G.H. (1999) Hypodematiaceae. In: K.S. Shing (ed.) Flora Reipublicae Popularis Sinicae, Vol. 4 (1). Science Press, Beijing, pp. 9, 151–191, 319.
Smith, A.R. & Cranfill, R.B. (2002) Intrafamilial relationships of the Thelypteroid ferns (Thelypteridaceae). American Fern Journal 92: 131–149. https://doi.org/10.1640/0002-8444(2002)092[0131:IROTTF]2.0.CO;2
Smith, A.R., Pryer, K.M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P.G. (2006) A classification for extant ferns. Taxon 55: 705–731. https://doi.org/10.2307/25065646
Thiers, B. (2019 [continuously updated]) Index herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s virtual herbarium [online]. Available at http:// sweetgum.nybg.org/ih/ (accessed April 2019)
Tsai, J.-L. & Shieh, W.-C. (1994) Aspidiaceae. In: Huang, T.C. (ed.) Flora of Taiwan, Second Edition. Vol. 1. Editorial Committee of the Flora of Taiwan, Taipei, pp. 290.
Wang, F.-G., Liu, D.-M. & Xing, F.-W. (2010) Two new species of Hypodematium (Hypodematiaceae) from limestone areas in Guangdong, China. Botanical Studies 51: 99–106.
Wang, R.-X., Shao, W. & Liu, L. (2014) Cytotaxonomic study of Hypodematium (Hypodematiaceae) from China. Phytotaxa 161: 101–110. https://doi.org/10.11646/phytotaxa.161.2.1
Zhang, G.-M. & Iwatsuki, K. (2013) Hypodematium. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China, Vols. 2–3 (Pteridophytes). Beijing: Science Press and St. Louis: Missouri Botanical Garden Press, pp. 535–540.