Isoetes howellii

Isoetes howellii
Conservation status
	; Apparently Secure(NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Lycophytes
Class:	Lycopodiopsida
Order:	Isoetales
Family:	Isoetaceae
Genus:	Isoetes
Species:	I. howellii
Binomial name
	Isoetes howellii; Engelm.
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

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

Description

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

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

External links

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

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