Isoetes occidentalis

Taxonavigation

Taxonavigation: Isoetales
Superregnum: Eukaryota Regnum: Plantae Divisio: Tracheophyta Divisio: Lycopodiophyta Classis: Isoetopsida Ordo: Isoetales

Isoetes occidentalis L.F.Hend., Bull. Torrey Bot. Club 27: 358. 1900.

Type: United States, Idaho, Lake Coeur d'Alene, August–Sept. 1897. Henderson No. 4786.

Heterotypic
- Isoetes echinospora var. flettii A.A.Eaton, Fern Bull. 13: 51. 1905.
  - Isoetes echinospora subsp. flettii (A.A.Eaton) Piper & Beattie, Fl. N.W. Coast: 16. 1915.
  - Isoetes echinospora f. flettii (A.A.Eaton) Clute, Fern Bull. 16: 55. 1908.
  - Isoetes flettii (A.A.Eaton) N.Pfeiff., Ann. Missouri Bot. Gard. 9(2): 186. 1922.
  - Isoetes maritima var. flettii (A.A.Eaton) C.F.Reed, Amer. Fern J. 35: 85. 1945.
- Isoetes lacustris var. paupercula Engelm., Trans. Acad. Sci. St. Louis 4: 377. 1882.
  - Isoetes lacustris subsp. paupercula (Engelm.) Feilberg, Nordic J. Bot. 4: 155. 1984. DOI: 10.1111/j.1756-1051.1984.tb01483.x
  - Isoetes macrospora f. paupercula (Engelm.) Clute, Fern Bull. 16: 56. 1908.
  - Isoetes paupercula (Engelm.) A.A.Eaton, Proc. U.S. Nat. Mus. 23(1226): 649. 1901.
- Isoetes piperi A.A.Eaton, Fern Bull. 13: 51. 1905.
  - Isoetes piperi A.A.Eaton, Fern Bull. 11: 85. 1903 nom. nud.
  - Isoetes howellii f. piperi (A.A.Eaton) Clute, Fern Bull. 16: 56. 1908.
  - Isoetes howellii var. piperi (A.A.Eaton) Clute, Fern-Allies 246, 258. 1905.
  - Isoetes occidentalis var. piperi (A.A.Eaton) A.Nelson & J.F.Macbr., Bot. Gaz. 61(1): 30. 1916.

Native distribution areas:

Continental: Northern America
- Regional: Subarctic America
  - Aleutian Islands, Alaska
- Regional: Western Canada
  - Alberta, British Columbia
- Regional: Northwestern U.S.A.
  - Colorado, Idaho, Montana, Oregon, Washington, Wyoming
- Regional: Southwestern U.S.A.
  - California, Utah.

Troìa, A., Pereira, J.B.S., Kim, C. & Taylor, W.C. 2016. The genus Isoetes (Isoetaceae): a provisional checklist of the accepted and unresolved taxa. Phytotaxa 277(2): 101–145. DOI: 10.11646/phytotaxa.277.2.1 ResearchGate Reference page.

USDA NRCS PLANTS Profile
Hassler, M. & Schmitt, B. 2017. World Ferns. Checklist of the Ferns and Lycophytes of the World. Version 7.19 – August 2017. Accessed 10 Sep 2017.

English: Western Quillwort

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