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
<p>Ching, R.-C. (1963) A reclassification of the family Thelypteridaceae from the mainland of Asia. <em>Acta Phytotaxonomica Sinica</em> 8: 289–335.</p>
<p>Ching, R.-C. (1975) Two new fern families.<em> Acta Phytotaxonomica Sinica </em>13: 96–98.</p>
<p>Ching, R.-C. (1975)<em> Hypodematium </em>Kunze.<em> Flora Jiangsuensis</em>, Vol. 1. Jiangsu: Jiangsu People’s Publishing House, pp. 49, 465.</p>
<p>Fan, X.-P., Zhang, L., Ralf, K., He, H., Gao, X.-F. & Zhang, L.-B. (2021) <em>Hypodematium shingii</em> <em>sp. nov.</em> (Hypodematiaceae; Polypodiales): Replacing the misapplied “<em>H. crenatum</em>”, a widespread fern from Asia. <em>Phytotaxa</em> 482 (1): 87–92. https://doi.org/10.11646/phytotaxa.482.1.10</p>
<p>Fan, X.-P., Gao, X.-F. & Zhang, L.-B. (2020) Taxonomy of the fern genus <em>Hypodematium</em> (Pteridophyta: Hypodematiaceae) from Japan. <em>Phytotaxa</em> 455 (2): 161–166. https://doi.org/10.11646/phytotaxa.455.2.7</p>
<p>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. <em>Molecular Phylogenetics and Evolution.</em></p>
<p>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. <em>Mémoires sur les Familles des Fougères</em>, Vol. 7. V. Berger- Levrault, Strasbourg,107 pp. https://doi.org/10.5962/bhl.title.116435</p>
<p>Forsskål, P. (1775) <em>Flora Aegyptiaco-Arabica</em>. Möller, Havniæ (Copenhagen). 219 pp.</p>
<p>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.</p>
<p>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)</p>
<p>Iwatsuki, K. (1964) On <em>Hypodematium </em>Kunze. <em>Acta Phytotaxonomica et Geobotanica</em> 21: 43–54.</p>
<p>Kuhn, F.A.M. & Decken, C.L. von der (1879) Cryptogamae vasculares. Ordo II. Polypodiaceae. R. Br. 30. <em>Hypodematium</em> Kze. <em>Reisen in Ost Afrika</em> 3 (3): 36–37.</p>
<p>Kunze, G. (1833) <em>Hypodematium</em>, eine neue Farngattung. <em>Flora</em> 16: 689–691.</p>
<p>Lee, C.S., Lee, K., Yeau, S.H. & Chung, K.S. (2018) Phylogenetic study of the fern genus <em>Hypodematium</em> (Hypodematiaceae), focusing on Korean native taxa. <em>Korean Journal of Plant Taxonomy</em> 48 (3): 163–171. https://doi.org/10.11110/kjpt.2018.48.3.163</p>
<p>Li, X.-J., Li, J.-X. & Meng, F.-Y. (2018) A new species of <em>Hypodematium </em>(Hypodematiaceae) from china. <em>Phytokeys </em>92: 37–44. https://doi.org/10.3897/phytokeys.92.21815</p>
<p>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 <em>Arthropteris.</em> <em>Taxon</em> 62: 688–700. https://doi.org/10.12705/624.26</p>
<p>Loyal, D.S. (1972) Morphology of <em>Hypodematium crenatum</em> (forsk.) kuhn: comments on a recent paper. <em>American Fern Journal</em> 62 (3): 88–92. https://doi.org/10.2307/1546441</p>
<p>Pichi Sermolli, R.E.G. (1977) Tentamen Pteridophytorum genera in taxonomicum ordinem redigendi. <em>Webbia</em> 31: 313–512. https://doi.org/10.1080/00837792.1977.10670077</p>
<p>PPG I. (2016) A community-derived classification for extant lycophytes and ferns. <em>Journal of Systematics and Evolution</em> 54: 563–603. https://doi.org/10.1111/jse.12229</p>
<p>Schuettpelz, E. & Pryer, K.M. (2007) Fern phylogeny inferred from 400 leptosporangiate species and three plastid genes. <em>Taxon </em>56: 1037–1050. https://doi.org/10.2307/25065903</p>
<p>Shing, K.S., Chiu, P.S. & Yao, G.H. (1999) Hypodematiaceae.<em> In: </em>K.S. Shing (ed.) <em>Flora Reipublicae Popularis Sinicae</em>, Vol. 4 (1). Science Press, Beijing, pp. 9, 151–191, 319.</p>
<p>Smith, A.R. & Cranfill, R.B. (2002) Intrafamilial relationships of the Thelypteroid ferns (Thelypteridaceae). <em>American Fern Journal</em> 92: 131–149. https://doi.org/10.1640/0002-8444(2002)092[0131:IROTTF]2.0.CO;2</p>
<p>Smith, A.R., Pryer, K.M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P.G. (2006) A classification for extant ferns. <em>Taxon</em> 55: 705–731. https://doi.org/10.2307/25065646</p>
<p>Thiers, B. (2019 [continuously updated]) <em>Index herbariorum</em>: <em>a global directory of public herbaria and associated staff.</em> New York Botanical Garden’s virtual herbarium [online]. Available at http:// sweetgum.nybg.org/ih/ (accessed April 2019)</p>
<p>Tsai, J.-L. & Shieh, W.-C. (1994) Aspidiaceae.<em> In: </em>Huang, T.C. (ed.) <em>Flora of Taiwan</em>, Second Edition. Vol. 1. Editorial Committee of the Flora of Taiwan, Taipei, pp. 290.</p>
<p>Wang, F.-G., Liu, D.-M. & Xing, F.-W. (2010) Two new species of <em>Hypodematium </em>(Hypodematiaceae) from limestone areas in Guangdong, China. <em>Botanical Studies </em>51: 99–106.</p>
<p>Wang, R.-X., Shao, W. & Liu, L. (2014) Cytotaxonomic study of <em>Hypodematium</em> (Hypodematiaceae) from China. <em>Phytotaxa</em> 161: 101–110. https://doi.org/10.11646/phytotaxa.161.2.1</p>
<p>Zhang, G.-M. & Iwatsuki, K. (2013) <em>Hypodematium. In: </em>Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) <em>Flora of China</em>, Vols. 2–3 (Pteridophytes). Beijing: Science Press and St. Louis: Missouri Botanical Garden Press, pp. 535–540.</p>
<p>Ching, R.-C. (1975) Two new fern families.<em> Acta Phytotaxonomica Sinica </em>13: 96–98.</p>
<p>Ching, R.-C. (1975)<em> Hypodematium </em>Kunze.<em> Flora Jiangsuensis</em>, Vol. 1. Jiangsu: Jiangsu People’s Publishing House, pp. 49, 465.</p>
<p>Fan, X.-P., Zhang, L., Ralf, K., He, H., Gao, X.-F. & Zhang, L.-B. (2021) <em>Hypodematium shingii</em> <em>sp. nov.</em> (Hypodematiaceae; Polypodiales): Replacing the misapplied “<em>H. crenatum</em>”, a widespread fern from Asia. <em>Phytotaxa</em> 482 (1): 87–92. https://doi.org/10.11646/phytotaxa.482.1.10</p>
<p>Fan, X.-P., Gao, X.-F. & Zhang, L.-B. (2020) Taxonomy of the fern genus <em>Hypodematium</em> (Pteridophyta: Hypodematiaceae) from Japan. <em>Phytotaxa</em> 455 (2): 161–166. https://doi.org/10.11646/phytotaxa.455.2.7</p>
<p>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. <em>Molecular Phylogenetics and Evolution.</em></p>
<p>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. <em>Mémoires sur les Familles des Fougères</em>, Vol. 7. V. Berger- Levrault, Strasbourg,107 pp. https://doi.org/10.5962/bhl.title.116435</p>
<p>Forsskål, P. (1775) <em>Flora Aegyptiaco-Arabica</em>. Möller, Havniæ (Copenhagen). 219 pp.</p>
<p>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.</p>
<p>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)</p>
<p>Iwatsuki, K. (1964) On <em>Hypodematium </em>Kunze. <em>Acta Phytotaxonomica et Geobotanica</em> 21: 43–54.</p>
<p>Kuhn, F.A.M. & Decken, C.L. von der (1879) Cryptogamae vasculares. Ordo II. Polypodiaceae. R. Br. 30. <em>Hypodematium</em> Kze. <em>Reisen in Ost Afrika</em> 3 (3): 36–37.</p>
<p>Kunze, G. (1833) <em>Hypodematium</em>, eine neue Farngattung. <em>Flora</em> 16: 689–691.</p>
<p>Lee, C.S., Lee, K., Yeau, S.H. & Chung, K.S. (2018) Phylogenetic study of the fern genus <em>Hypodematium</em> (Hypodematiaceae), focusing on Korean native taxa. <em>Korean Journal of Plant Taxonomy</em> 48 (3): 163–171. https://doi.org/10.11110/kjpt.2018.48.3.163</p>
<p>Li, X.-J., Li, J.-X. & Meng, F.-Y. (2018) A new species of <em>Hypodematium </em>(Hypodematiaceae) from china. <em>Phytokeys </em>92: 37–44. https://doi.org/10.3897/phytokeys.92.21815</p>
<p>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 <em>Arthropteris.</em> <em>Taxon</em> 62: 688–700. https://doi.org/10.12705/624.26</p>
<p>Loyal, D.S. (1972) Morphology of <em>Hypodematium crenatum</em> (forsk.) kuhn: comments on a recent paper. <em>American Fern Journal</em> 62 (3): 88–92. https://doi.org/10.2307/1546441</p>
<p>Pichi Sermolli, R.E.G. (1977) Tentamen Pteridophytorum genera in taxonomicum ordinem redigendi. <em>Webbia</em> 31: 313–512. https://doi.org/10.1080/00837792.1977.10670077</p>
<p>PPG I. (2016) A community-derived classification for extant lycophytes and ferns. <em>Journal of Systematics and Evolution</em> 54: 563–603. https://doi.org/10.1111/jse.12229</p>
<p>Schuettpelz, E. & Pryer, K.M. (2007) Fern phylogeny inferred from 400 leptosporangiate species and three plastid genes. <em>Taxon </em>56: 1037–1050. https://doi.org/10.2307/25065903</p>
<p>Shing, K.S., Chiu, P.S. & Yao, G.H. (1999) Hypodematiaceae.<em> In: </em>K.S. Shing (ed.) <em>Flora Reipublicae Popularis Sinicae</em>, Vol. 4 (1). Science Press, Beijing, pp. 9, 151–191, 319.</p>
<p>Smith, A.R. & Cranfill, R.B. (2002) Intrafamilial relationships of the Thelypteroid ferns (Thelypteridaceae). <em>American Fern Journal</em> 92: 131–149. https://doi.org/10.1640/0002-8444(2002)092[0131:IROTTF]2.0.CO;2</p>
<p>Smith, A.R., Pryer, K.M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P.G. (2006) A classification for extant ferns. <em>Taxon</em> 55: 705–731. https://doi.org/10.2307/25065646</p>
<p>Thiers, B. (2019 [continuously updated]) <em>Index herbariorum</em>: <em>a global directory of public herbaria and associated staff.</em> New York Botanical Garden’s virtual herbarium [online]. Available at http:// sweetgum.nybg.org/ih/ (accessed April 2019)</p>
<p>Tsai, J.-L. & Shieh, W.-C. (1994) Aspidiaceae.<em> In: </em>Huang, T.C. (ed.) <em>Flora of Taiwan</em>, Second Edition. Vol. 1. Editorial Committee of the Flora of Taiwan, Taipei, pp. 290.</p>
<p>Wang, F.-G., Liu, D.-M. & Xing, F.-W. (2010) Two new species of <em>Hypodematium </em>(Hypodematiaceae) from limestone areas in Guangdong, China. <em>Botanical Studies </em>51: 99–106.</p>
<p>Wang, R.-X., Shao, W. & Liu, L. (2014) Cytotaxonomic study of <em>Hypodematium</em> (Hypodematiaceae) from China. <em>Phytotaxa</em> 161: 101–110. https://doi.org/10.11646/phytotaxa.161.2.1</p>
<p>Zhang, G.-M. & Iwatsuki, K. (2013) <em>Hypodematium. In: </em>Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) <em>Flora of China</em>, Vols. 2–3 (Pteridophytes). Beijing: Science Press and St. Louis: Missouri Botanical Garden Press, pp. 535–540.</p>