{{Short description|Genus of ferns}} {{Automatic taxobox | image = Hemionitis palmata - Botanischer Garten München-Nymphenburg - DSC08176.JPG | image_caption = ''Hemionitis palmata'' in the Botanical Garden Munich-Nymphenburg | taxon = Hemionitis | authority = L.<ref name=PPGI/> | subdivision_ranks = Species | subdivision = See text. }}
'''''Hemionitis''''' is a genus of ferns in the subfamily Cheilanthoideae of the family Pteridaceae.<ref name=PPGI/> Its circumscription varies greatly in different systems of fern classification. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it was one of more than 20 genera in the subfamily Cheilanthoideae, and was said to have five species.<ref name=PPGI/> Other sources treat it as the only genus in the subfamily, and so accept about 450 species.<ref name=POWO_17397830-1/> With the restricted circumscription, species are native to tropical America.<ref name=PPGI/>
==Taxonomy== {{See also|Cheilanthoideae#Genera}} The genus ''Hemionitis'' was first described by Carl Linnaeus in 1753.<ref name="IPNI_17397830-1">{{citation |title=''Hemionitis'' L. |work=The International Plant Names Index |url=https://www.ipni.org/n/17397830-1 |accessdate=2020-01-06 }}</ref> The genus name is pre-Linnaean, being used for example in the ''Hortus Cliffortianus'',<ref name=Linn53/> and derives from the Greek word {{lang|grc|ἡμίονος}} ({{transliteration|grc|hemionos}}), meaning 'mule', referring to the belief that the plants were sterile.<ref name=HyamPank95/> (Linnaeus used the same word in the name "''Asplenium hemionitis''".)
The division of the subfamily Cheilanthoideae into genera varies greatly between sources {{As of|2020|January|lc=yes}}. Christenhusz et al. (2011), the Pteridophyte Phylogeny Group classification of 2016 (PPG I), and the ''Checklist of Ferns and Lycophytes of the World'' divide the subfamily into 20 or more genera, of which one is ''Hemionitis'' sensu stricto.<ref name=ChriZhanSchn11/><ref name=PPGI/><ref name=CFLW/> On the other hand, Christenhusz et al. (2018) and ''Plants of the World Online'' use ''Hemionitis'' sensu lato as a catch-all genus for the subfamily, resulting in about 450 species.<ref name=ChriFayByng18/><ref name=POWO_17397830-1/>
===Species=== Using the PPG I approach, {{As of|2020|January|lc=yes}}, the ''Checklist of Ferns and Lycophytes of the World'' accepted the following species (and one hybrid) in ''Hemionitis'' sensu stricto. All are native to tropical America.<ref name=CFLW/> *''Hemionitis levyi'' <small>E.Fourn.</small> *''Hemionitis palmata'' <small>L.</small> *''Hemionitis pinnatifida'' <small>Baker</small> *''Hemionitis rufa'' <small>(L.) Sw.</small> *''Hemionitis tomentosa'' <small>(Lam.) Raddi</small> *''Hemionitis umbrosa'' <small>R.Y.Hirai & J.Prado</small> *''Hemionitis'' × ''smithii'' <small>(Trevis.) C.Chr.</small> = ''H. palmata'' × ''H. rufa''
==References== {{Reflist|refs= <ref name=CFLW>{{Citation |mode=cs1 |last1=Hassler |first1=Michael |last2=Schmitt |first2=Bernd |date=January 2020 |contribution=Hemionitis |title=Checklist of Ferns and Lycophytes of the World |at=8.20 |url=https://worldplants.webarchiv.kit.edu/ferns/ |accessdate=2020-01-02 |name-list-style=amp |archive-date=2017-09-02 |archive-url=https://web.archive.org/web/20170902225743/http://worldplants.webarchiv.kit.edu/ferns/ |url-status=dead }}</ref>
<ref name=ChriFayByng18>{{Citation |editor1-last=Christenhusz |editor1-first=M.J.M. |editor2-last=Fay |editor2-first=M.F. |editor3-last=Byng |editor3-first=J.W. |date=2018 |title=GLOVAP nomenclature. Part 1 |journal=The Global Flora: A Practical Flora to Vascular Plant Species of the World |volume=4 |pages=1–155 |name-list-style=amp }}</ref>
<ref name=ChriZhanSchn11>{{Citation |last1=Christenhusz |first1=Maarten |last2=Zhang |first2=Xian-Chun |last3=Schneider |first3=Harald |date=2011 |title=A linear sequence of extant families and genera of lycophytes and ferns |journal=Phytotaxa |volume=19 |pages=7–54 |doi=10.11646/phytotaxa.19.1.2 |url=https://helda.helsinki.fi/handle/10138/28042 |accessdate=2013-08-11 |name-list-style=amp |doi-access=free |hdl=10138/28042 |hdl-access=free }}</ref>
<ref name=HyamPank95>{{Citation |last1=Hyam |first1=R. |last2=Pankhurst |first2=R.J. |year=1995 |title=Plants and their names: a concise dictionary |publication-place=Oxford |publisher=Oxford University Press |isbn=978-0-19-866189-4 |name-list-style=amp |page=235 }}</ref>
<ref name=Linn53>{{Citation |last1=Linnaeus |first1=Carl |date=1753 |contribution=Hemionitis |title=Species Plantarum 2 |page=1077 |contribution-url=https://biodiversitylibrary.org/page/359098 |accessdate=2020-01-06 }}</ref>
<ref name=POWO_17397830-1>{{Citation |title=''Hemionitis'' L. |work=Plants of the World Online |publisher=Royal Botanic Gardens, Kew|url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:17397830-1 |accessdate=2020-01-06 }}</ref>
<ref name=PPGI>{{Citation |author=PPG I |year=2016 |title=A community-derived classification for extant lycophytes and ferns |journal=Journal of Systematics and Evolution |volume=54 |issue=6 |pages=563–603 |doi=10.1111/jse.12229|s2cid=39980610 |doi-access=free }}</ref> }}
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Category:Pteridaceae Category:Fern genera