Article · Wikipedia archive · Last revised Jul 15, 2026

Hymenasplenium

Hymenasplenium is one of three genera of ferns in the Aspleniaceae, in the eupolypods II clade of the order Polypodiales. The others are Hemidictyum and Asplenium. Hymenasplenium was segregated because it is a natural grouping with differing rhizome morphology – dorsiventral v. radial for the rest of Asplenium, differing chromosome count – x=39 v. x=36 for the rest of Asplenium, and a clear monophyletic grouping based on genetic analysis. It was confirmed as a sister group to Asplenium in a 2015 molecular study of the genera.

Last revised
Jul 15, 2026
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Hymenasplenium
Hymenasplenium cheilosorum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Suborder: Aspleniineae
Family: Aspleniaceae
Genus: Hymenasplenium
Hayata
Type species
Hymenasplenium unilaterale
(Lam.) Hayata. 1927
Synonyms
  • Asplenium section Hymenasplenium (Hayata 1927) Iwatsuki 1975
  • Asplenium (Hymenasplenium) (Hayata 1927) Bir 1998
  • Boniniella Hayata 1927
  • Asplenium series Unilateralia Ching & Wu 1989

Hymenasplenium is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales.12 The others are Hemidictyum and Asplenium. Hymenasplenium was segregated because it is a natural grouping with differing rhizome morphology – dorsiventral v. radial for the rest of Asplenium, differing chromosome count – x=39 v. x=36 for the rest of Asplenium, and a clear monophyletic grouping based on genetic analysis. It was confirmed as a sister group to Asplenium in a 2015 molecular study of the genera.3

List of species

As of July 2025, the Checklist of Ferns and Lycophytes of the World recognized the sixty-seven species and three hybrids below.4

  • Hymenasplenium amoenum (C.Presl ex Mett.) Ranil
  • Hymenasplenium andohahelense Viane
  • Hymenasplenium antsirananense Viane
  • Hymenasplenium apogamum (N.Murak. & Hatan.) Nakaike
  • Hymenasplenium basiscopicum (R.C.Moran & Sundue) L.Regalado & Prada
  • Hymenasplenium cardiophyllum (Hance) Nakaike
  • Hymenasplenium changputungense (Ching) Viane & S.Y.Dong
  • Hymenasplenium cheilosorum (Kunze ex Mett.) Tagawa
  • Hymenasplenium chingii K.W.Xu, Li Bing Zhang & W.B.Liao
  • Hymenasplenium delitescens (Maxon) L.Regalado & Prada
  • Hymenasplenium denticulatum K.W.Xu, Li Bing Zhang & W.B.Liao
  • Hymenasplenium distans Li Bing Zhang, K.W.Xu & Liang Zhang
  • Hymenasplenium excisum (C.Presl) S.Linds.
  • Hymenasplenium filipes (Copel.) Sugim.
  • Hymenasplenium furfuraceum (Ching) Viane & S.Y.Dong
  • Hymenasplenium guineense Li Bing Zhang, W.B.Liao & K.W.Xu
  • Hymenasplenium hastifolium K.W.Xu, Li Bing Zhang & W.B.Liao
  • Hymenasplenium hoffmannii (Hieron.) L.Regalado & Prada
  • Hymenasplenium hondoense (N.Murak. & Hatan.) Nakaike
  • Hymenasplenium hovenkampii K.W.Xu & Li Bing Zhang
  • Hymenasplenium ikenoi (Makino) Viane
  • Hymenasplenium inthanonense N.Murak. & J.Yokoy.
  • Hymenasplenium kenyense Li Bing Zhang, K.W.Xu & Kamau
  • Hymenasplenium kinabaluense Li Bing Zhang & K.W.Xu
  • Hymenasplenium laetum (Sw.) L.Regalado & Prada
  • Hymenasplenium latedens (Ching) Viane & S.Y.Dong
  • Hymenasplenium laterepens N.Murak. & X.Cheng ex Y.Fen Chang & K.Hori
  • Hymenasplenium madagascariense Li Bing Zhang, W.B.Liao & K.W.Xu
  • Hymenasplenium murakami-hatanakae Nakaike
  • Hymenasplenium neocaledonicum Li Bing Zhang & K.W.Xu
  • Hymenasplenium ngheanense Li Bing Zhang, K.W.Xu & N.T.Lu
  • Hymenasplenium nigricostatum Li Bing Zhang & K.W.Xu
  • Hymenasplenium obliquissimum (Hayata) Sugim.
  • Hymenasplenium obscurum (Blume) Tagawa
  • Hymenasplenium obtusidentatum Y.Fen Chang & G.Cheng Zhang
  • Hymenasplenium obtusifolium (L.) L.Regalado & Prada
  • Hymenasplenium ofeliae (Salgado) Barcelona & Pelser
  • Hymenasplenium oligosorum Li Bing Zhang, K.W.Xu & Lorence
  • Hymenasplenium ortegae (N.Murak. & R.C.Moran) L.Regalado & Prada
  • Hymenasplenium perriei Li Bing Zhang & K.W.Xu
  • Hymenasplenium phamhoanghoi Li Bing Zhang, K.W.Xu & T.T.Luong
  • Hymenasplenium praestans (Copel.) Testo, Riibe & Sundue
  • Hymenasplenium pseudobscurum Viane
  • Hymenasplenium pubirhizoma (Ching & Z.Y.Liu) K.W.Xu & Li Bing Zhang
  • Hymenasplenium purpurascens (Mett.) L.Regalado & Prada
  • Hymenasplenium quangnamense Li Bing Zhang, K.W.Xu & Liang Zhang
  • Hymenasplenium queenslandicum Li Bing Zhang & K.W.Xu
  • Hymenasplenium quercicola (Ching) Viane & S.Y.Dong
  • Hymenasplenium repandulum (Kunze) L.Regalado & Prada
  • Hymenasplenium riparium (Liebm.) L.Regalado & Prada
  • Hymenasplenium rivulare (Fraser-Jenk.) Viane & S.Y.Dong
  • Hymenasplenium sabahense Li Bing Zhang, K.W.Xu & C.W.Chen
  • Hymenasplenium samoaense Li Bing Zhang, K.W.Xu & K.R.Wood
  • Hymenasplenium sinense K.W.Xu, Li Bing Zhang & W.B.Liao
  • Hymenasplenium solomonense Li Bing Zhang & K.W.Xu
  • Hymenasplenium speluncicola Li Bing Zhang, K.W.Xu & H.He
  • Hymenasplenium subnormale (Copel.) Nakaike
  • Hymenasplenium szechuanense (Ching) Viane & S.Y.Dong
  • Hymenasplenium tholiforme Liang Zhang, W.B.Ju & K.W.Xu
  • Hymenasplenium trapeziforme (Wall. ex Roxb.) comb.ined., Asplenium trapeziforme Wall. ex Roxb.
  • Hymenasplenium triquetrum (N.Murak. & R.C.Moran) L.Regalado & Prada
  • Hymenasplenium unilaterale (Lam.) Hayata
  • Hymenasplenium vanuatuense Li Bing Zhang & K.W.Xu
  • Hymenasplenium volubile (N.Murak. & R.C.Moran) L.Regalado & Prada
  • Hymenasplenium wangpeishanii Li Bing Zhang & K.W.Xu
  • Hymenasplenium wildii (Bail.) D.J.Ohlsen
  • Hymenasplenium wusugongii Li Bing Zhang, W.B.Liao & K.W.Xu

Hybrids

  • Hymenasplenium × doanyense Viane
  • Hymenasplenium × excurum Viane
  • Hymenasplenium × incisoserratum (Rosenst.) comb.ined., Asplenium × incisoserratum (Rosenst.) N.Murak. & R.C.Moran

Phylogeny

Phylogeny from Fern Tree of Life56
Hymenasplenium

H. delitescens (Maxon) Regalado & Prada

H. hoffmannii (Hieronymus) Regalado & Prada

H. laetum (Swartz) Regalado & Prada

H. praestans (Copeland) Testo, Riibe & Sundue

H. triquetrum (N.Murak. & Moran) Regalado & Prada

H. riparium (Liebmann) Regalado & Prada

H. volubile (N.Murak. & Moran) Regalado & Prada

H. phamhoanghoi Zhang, Xu & Luong

H. excisum (Presl) S.Linds. 2009 (Scalloped spleenwort)

H. obscurum (Blume) Tagawa

H. tholiforme Zhang, Ju & Xu

H. pseudobscurum Viane

H. obtusidentatum Chang & Zhang

H. cheilosorum

H. amoenum (Presl ex Mettenius) Ranil

H. filipes (Copeland) Sugim.

H. obliquissimum (Hayata) Sugim.

H. szechuanense (Ching) Viane & Dong

H. furfuraceum (Ching) Viane & Dong

H. latidens (Ching) Viane & Dong

H. quercicola (Ching) Viane & Dong

H. subnormale (Copeland) Nakaike

H. wildii (Bail.) Ohlsen

H. distans Zhang, Xu & Zhang

H. apogamum (N.Murak. & Hatan.) Nakaike

H. ngheanense Zhang, Xu & Lu

H. laterepens N.Murak. & Cheng ex Chang & Hori

H. unilaterale (Lam.) Hayata

H. cardiophyllum (Hance) Nakaike

H. quangnamense Zhang, Xu & Zhang

H. hastifolium Xu, Zhang & Liao

H. pubirhizoma (Ching & Liu) Xu & Zhang

H. chingii Xu, Zhang & Liao

H. wangpeishanii Zhang & Xu

H. hondoense (N.Murak. & Hatan.) Nakaike

H. speluncicola Zhang, Xu & He

References

References

  1. Alan R. Smith; Kathleen M. Pryer; Eric Schuettpelz; Petra Korall; Harald Schneider; Paul G. Wolf (2006). "A classification for extant ferns" (PDF). Taxon. 55 (3): 705–731. Bibcode:2006Taxon..55..705S. doi:10.2307/25065646. JSTOR 25065646. Archived from the original (PDF) on February 26, 2008.
  2. Maarten J. M. Christenhusz; Xian-Chun Zhang; Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54. Bibcode:2011Phytx..19....7C. doi:10.11646/phytotaxa.19.1.2.
  3. Ohlsen DJ, Perrie LR, Shepherd LD, Brownsey PJ, Bayly MJ (2015). "Phylogeny of the fern family Aspleniaceae in Australasia and the south-western Pacific". Australian Systematic Botany. 27 (6): 355–71. doi:10.1071/sb14043.
  4. Hassler, Michael. "Hymenasplenium". World Ferns. Retrieved 2025-07-15.
  5. Nitta, Joel H.; Schuettpelz, Eric; Ramírez-Barahona, Santiago; Iwasaki, Wataru; et al. (2022). "An Open and Continuously Updated Fern Tree of Life". Frontiers in Plant Science. 13 909768. Bibcode:2022FrPS...1309768N. doi:10.3389/fpls.2022.909768. PMC 9449725. PMID 36092417.
  6. "Tree viewer: interactive visualization of FTOL". FTOL v1.7.0 (GenBank release 261). 2024. Retrieved 1 May 2025.