Isoetes valida

Isoetes valida, commonly known as the strong quillwort or true quillwort, is an aquatic lycophyte native to eastern North America. It is found primarily in the Appalachian Mountains from Pennsylvania south to Alabama and Georgia. In addition, one collection of the plant was made in a railway ditch in Wilmington, Delaware in the 1860s, but this was most likely an accidental introduction.[3][4]

Isoetes valida

Apparently Secure  (NatureServe)[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Lycophytes
Class: Lycopodiopsida
Order: Isoetales
Family: Isoetaceae
Genus: Isoetes
Species:
I. valida
Binomial name
Isoetes valida
(Engelm.) Clute
Synonyms[2]

I. engelmannii var. valida

Some sources consider Isoetes caroliniana a synonym of this species,[5] others regard it as a separate species.[6]

References
  1. "Isoetes valida". NatureServe Explorer. NatureServe. Retrieved 2007-12-20.
  2. Hassler, Michael & Schmitt, Bernd (November 2019). "Isoetes valida". Checklist of Ferns and Lycophytes of the World. 8.11. Retrieved 2019-11-18.
  3. Brunton, Daniel F.; Britton, Donald M.; Britton, Donald M (1996), "Taxonomy and Distribution of Isoetes valida", American Fern Journal, American Fern Society, 86 (1): 16–25, doi:10.2307/1547604, JSTOR 1547604
  4. Taylor, W. Carl; Luebke, Neil T.; Britton, Donald M.; Hickey, R. James; Brunton, Daniel F. (1993), "Isoetes caroliniana", in Flora of North America Editorial Committee, eds. 1993+ (ed.), Flora of North America, 2, New York & Oxford: Oxford University Press
  5. "Isoetes caroliniana (A.A.Eaton) Luebke", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-11-18
  6. Hassler, Michael & Schmitt, Bernd (November 2019). "Isoetes caroliniana". Checklist of Ferns and Lycophytes of the World. 8.11. Retrieved 2019-11-18.


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