Pentagramma

{{Short description|Genus of ferns}} {{Automatic taxobox | image = Pentagramma triangularis 1.jpg | image_caption = ''Pentagramma triangularis'' | taxon = Pentagramma | authority = Yatsk., Windham & E.Wollenw. | subdivision_ranks = Species | subdivision = See text. }}

'''''Pentagramma''''' is a small genus of North American ferns in the family Pteridaceae. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy.<ref>{{Cite journal|last1=Yatskievych|first1=George|last2=Windham|first2=Michael D.|last3=Wollenweber|first3=Eckhard|date=1990|title=A Reconsideration of the Genus Pityrogramma (Adiantaceae) in Western North America|jstor=1547301|journal=American Fern Journal|volume=80|issue=1|pages=9–17|doi=10.2307/1547301}}</ref> In the most recent treatment, six diploid species are recognized.<ref>{{Cite journal|last1=Schuettpelz|first1=Eric|last2=Pryer|first2=Kathleen M.|last3=Windham|first3=Michael D.|date=2015-10-01|title=A Unified Approach to Taxonomic Delimitation in the Fern Genus ''Pentagramma'' (Pteridaceae)|url=http://openurl.ingenta.com/content/xref?genre=article&issn=0363-6445&volume=40&issue=3&spage=629|journal=Systematic Botany|language=en|volume=40|issue=3|pages=629–644|doi=10.1600/036364415x689366|issn=0363-6445|hdl=10161/10796|s2cid=18266345|hdl-access=free|url-access=subscription}}</ref>

The distribution of ''P. triangularis'' (goldback fern) extends from British Columbia through the western United States into Baja California in northwestern Mexico.<ref>C.Michael Hogan, ed. 2010. [http://www.eol.org/pages/486561 ‘’Pentagramma triangularis’’ . Encyclopedia of Life.]</ref> ''Pentagramma maxonii'' occurs in New Mexico, Arizona, Sonora, Baja California Sur, California, and Baja California. All other species are restricted to California and Baja California.

Members of the genus ''Pentagramma'' produce a powdery-waxy secretion on their lower leaf surfaces, called farina. This character is shared with the related genus ''Notholaena''and other members of the Cheilanthoideae.

== Species == {{As of|2021|December}}, the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species:<ref name=CFLW/> *''Pentagramma glanduloviscida'' Schuettp. & Windham *''Pentagramma maxonii'' (Weath.) Schuettp. & Windham *''Pentagramma pallida'' (Weath.) Yatsk., Windham & E. Wollenw. *''Pentagramma rebmanii'' (Winner & M. G. Simpson) Schuettp. & Windham *''Pentagramma triangularis'' (Kaulf.) Yatsk., Windham & E. Wollenw. *''Pentagramma viscosa'' (Nutt. ex D. C. Eaton) Schuettp. & Windham

==References== {{Reflist|refs= <ref name=CFLW>{{citation |last=Hassler |first=Michael |contribution=Pentagramma |title=World Ferns. Synonymic Checklist and Distribution of Ferns and Lycophytes of the World |at=12.8 |url=https://www.worldplants.de/ferns/ |date=5 December 2021 |accessdate=2021-12-30}}</ref> }}

==External links== *[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?92,131 Jepson Manual Treatment] *[https://plants.usda.gov/java/profile?symbol=PENTA10 USDA Plants Profile: ''Pentagramma'']

Category:Pteridaceae Category:Ferns of California Category:Fern genera