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Pentagramma
''Pentagramma'' is a small genus of North American ferns. Until 1990 members of this genus were included in ''Pityrogramma'', and agreement has not yet been reached regarding the species' taxonomy.〔(Flora of North America )〕 There are one to three species, with two species commonly described and named ''Pentagramma pallida'' and ''P. triangularis''.〔 The distribution of ''P. triangularis'' (goldback fern) extends from British Columbia through the southwestern United States into northwestern Mexico,〔C.Michael Hogan, ed. 2010. (‘’Pentagramma triangularis’’ . Encyclopedia of Life. )〕 while ''P. pallida'' (pale silverback fern) is limited to the high mountains of California. == Species ==
* ''Pentagramma pallida'' (Weath.) Yatsk. et al. * ''Pentagramma triangularis'' (Kaulf.) Yatsk. et al.
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