''Pentagramma'' is a small genus of North American
ferns. Until 1990 members of this genus were included in ''
Pityrogramma
''Pityrogramma'', the silverback ferns, or goldback ferns, is a fern genus in the subfamily Pteridoideae of the family Pteridaceae.
Species
, ''Plants of the World Online'' recognized the following species and hybrids:
*'' Pityrogramma aurantia ...
'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid species are recognized.
The distribution of ''P. triangularis'' (goldback fern) extends from
British Columbia through the western United States into Baja California in northwestern Mexico.
[C.Michael Hogan, ed. 2010.]
‘’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 Californian and Baja California.
Members of the ''Pentagramma'' genus produce a powdery-waxy secretion on their lower leaf surfaces, called farina. This character is shared with the related ''Notholaena
''Notholaena'' (from Ancient Greek νόθο(ς) + χλαῖνα), cloak fern, is a genus of ferns in the Cheilanthoideae subfamily of the Pteridaceae. Ferns of this genus are mostly epipetric (growing on rock) or occurring in coarse, gravelly soi ...
'' genus.
Species
, the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species:[
*'']Pentagramma glanduloviscida
''Pentagramma'' is a small genus of North American ferns. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid ...
'' Schuettp. & Windham
*''Pentagramma maxonii
''Pentagramma'' is a small genus of North American ferns. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid ...
'' (Weath.) Schuettp. & Windham
*''Pentagramma pallida
''Pentagramma'' is a small genus of North American ferns. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid ...
'' (Weath.) Yatsk., Windham & E. Wollenw.
*''Pentagramma rebmanii
''Pentagramma'' is a small genus of North American ferns. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid ...
'' (Winner & M. G. Simpson) Schuettp. & Windham
*'' Pentagramma triangularis'' (Kaulf.) Yatsk., Windham & E. Wollenw.
*''Pentagramma viscosa
''Pentagramma'' is a small genus of North American ferns. Until 1990 members of this genus were included in ''Pityrogramma'', and there has been considerable disagreement regarding the species' taxonomy. In the most recent treatment, six diploid ...
'' (Nutt. ex D. C. Eaton) Schuettp. & Windham
References
External links
Jepson Manual TreatmentUSDA Plants Profile: ''Pentagramma''
Pteridaceae
Ferns of California
Fern genera
{{Pteridaceae-stub