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Isoetes howellii

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Isoetes howellii

Apparently Secure(NatureServe)
Scientific classificationEdit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Lycophytes
Class: Lycopodiopsida
Order: Isoetales
Family: Isoetaceae
Genus: Isoetes
Species:
I. howellii
Binomial name
Isoetes howellii
Synonyms
  • Isoetes melanopodaGay & Dur.var.californicaA.A. Eat.

Isoetes howellii,orHowell's quillwort,is a species ofquillwort,a type oflycophyte.It is anaquatic plantnative to North America.

Distribution

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Isotes howelii is found in western North America and grows in wet habitats such asvernal pools.

Description

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It produces 5 to 28 pointed, cylindrical, bright green leaves that can reach 30 centimeters in length. The velum covers roughly one third of the sphericalsporangia,which is 6 millimeters long. The ligule is in the shape of an elongated triangle. The megaspores are 420 to 610 micrometers in diameter. The coarse microspores are 25 to 30 micrometers long.[1]It is closely related toI. melanopodaand was first thought to be a variation of that species.

References

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  1. ^Cody, William; Britton, Donald (1989).Ferns and Fern Allies of Canada.Agriculture Canada.
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