Pentagramma

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Pentagramma
Pentagramma triangularis 1.jpg
Pentagramma triangularis
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Family: Pteridaceae
Subfamily: Cheilanthoideae
Genus: Pentagramma
Yatsk., Windham & E.Wollenw.
Species

See text.

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.[1] In the most recent treatment, six diploid species are recognized.[2]

The distribution of P. triangularis (goldback fern) extends from British Columbia through the western United States into Baja California in northwestern Mexico.[3] 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.

Species[]

As of January 2020, the Checklist of Ferns and Lycophytes of the World recognized the following species:[4]

  • Schuettp. & Windham
  • (Weath.) Schuettp. & Windham
  • (Weath.) Yatsk., Windham & E. Wollenw.
  • (Winner & M. G. Simpson) Schuettp. & Windham
  • Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw.
  • (Nutt. ex D. C. Eaton) Schuettp. & Windham

References[]

  1. ^ Yatskievych, George; Windham, Michael D.; Wollenweber, Eckhard (1990). "A Reconsideration of the Genus Pityrogramma (Adiantaceae) in Western North America". American Fern Journal. 80 (1): 9–17. doi:10.2307/1547301. JSTOR 1547301.
  2. ^ Schuettpelz, Eric; Pryer, Kathleen M.; Windham, Michael D. (2015-10-01). "A Unified Approach to Taxonomic Delimitation in the Fern Genus Pentagramma (Pteridaceae)". Systematic Botany. 40 (3): 629–644. doi:10.1600/036364415x689366. hdl:10161/10796. ISSN 0363-6445. S2CID 18266345.
  3. ^ C.Michael Hogan, ed. 2010. ‘’Pentagramma triangularis’’ . Encyclopedia of Life.
  4. ^ Hassler, Michael & Schmitt, Bernd (November 2019). "Oeosporangium". Checklist of Ferns and Lycophytes of the World. 8.11. Retrieved 2020-01-01.

External links[]


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