Hymenasplenium

Hymenasplenium is one of three genera of ferns in the Aspleniaceae (spleenwort family), in the eupolypods II clade of the order Polypodiales.[1][2] 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]

Hymenasplenium
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Suborder: Aspleniineae
Family: Aspleniaceae
Genus: Hymenasplenium
Hayata
Type species
Hymenasplenium unilaterale
(Lam.) Hayata. 1927
Synonyms
  • Asplenium sect. Hymenasplenium (Hayata) K. Iwats. 1975

Selected species
  • Hymenasplenium basiscopicum
  • Hymenasplenium cardiophyllum
  • Hymenasplenium cheilosorum
  • Hymenasplenium delitescens
  • Hymenasplenium hoffmannii
  • Hymenasplenium ikenoi
  • Hymenasplenium laetum
  • Hymenasplenium obtusifolium
  • Hymenasplenium ortegae
  • Hymenasplenium purpurascens
  • Hymenasplenium repandulum
  • Hymenasplenium riparium
  • Hymenasplenium triquetrum
  • Hymenasplenium unilaterale
  • Hymenasplenium volubile

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. 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. 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.
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