Isoetes howellii

Taxonavigation

Taxonavigation: Isoetales
Superregnum: Eukaryota Regnum: Plantae Divisio: Tracheophyta Divisio: Lycopodiophyta Classis: Lycopodiopsida Subclassis: Isoetidae Ordo: Isoetales

Familia: Isoetaceae
Genus: Isoetes
Species: Isoetes howellii

Name

Isoetes howellii Engelm., Trans. Acad. Sci. St. Louis 4: 385 (1882).

• Typus: U.S.A., Oregon: near The Dalles, June & August 1880, Howell s.n. (Holotypus: MO; isotypi: NY, US).

Synonyms

• Heterotypic
  • Isoetes melanopoda var. californica A.A.Eaton in Gilbert, Working List North American Pteridophytes 27 (1901).
    • Typus: Olema, Cal., Mrs. Brandegee & Miss Eastwood (Herb. Eaton, MO, MIN)
    • Isoetes melanopoda f. californica (A.A.Eaton) Clute, Fern-Allies 260 (1905).
  • Isoetes nuda Engelm., Trans. Acad. Sci. St. Louis 4: 385 (1882).
    • Typus: U.S.A., Oregon: near The Dalles, June & August 1880, Howell s.n. (among the specimens of the type collection of Isoetes howellii)
  • Isoetes underwoodii L.F.Hend., Bot. Gaz. 23: 124 (1897).
    • Type locality: Paradise creek, in and near Moscow, Idaho.

Hybrids

I. × marensis

Distribution

Native distribution areas:
Continental: Northern America Regional: Western Canada British Columbia. Regional: Northwestern U.S.A. Idaho, Montana, Oregon, Washington. Regional: Southwestern U.S.A. California, Utah. Regional: Mexico Mexico Northwest (Baja California, Baja California Sur). References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

References

Additional references

• 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. 

Links

• 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 7 Sep 2017.

Vernacular names

English: Howell's Quillwort