Isoëtes nuttallii

A. Braun ex Engelmann

Amer. Naturalist 8: 215. 1874.

Common names: Nuttall's quillwort
Synonyms: Isoëtes suksdorfii Baker
Treatment appears in FNA Volume 2.

Plants terrestrial or becoming so. Rootstock nearly globose, 2 (–3) -lobed. Leaves deciduous, dull green to gray-green or yellow-green, pale toward base, spirally arranged, to 20 cm, ± rigid, gradually tapering to tip, often surrounded at base by several black scales to ca. 5 mm, spirally arranged, rigid, almost brittle. Velum covering entire sporangium. Sporangium wall unpigmented. Megaspores white, 360–600 μm diam., lustrous, ± smooth to tuberculate; girdle obscure. Microspores brown in mass, 20–30 μm, papillose. 2n = 22.


Phenology: Spores mature in late spring–early summer.
Habitat: Seasonally wet soil, temporary streams
Elevation: mostly 0–1500 m

Distribution

V2 252-distribution-map.gif

B.C., Calif., Oreg., Wash.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Isoëtes nuttallii"
several +  and 1 +
W. Carl Taylor +, Neil T. Luebke +, Donald M. Britton +, R. James Hickey +  and Daniel F. Brunton +
A. Braun ex Engelmann +
Nuttall's quillwort +
alternating +
B.C. +, Calif. +, Oreg. +  and Wash. +
mostly 0–1500 m +
Seasonally wet soil, temporary streams +
pale +, green +  and gray-green or yellow-green +
straight +
deciduous +
recurved;erect;spreading +
tapering +
0 cm0 mm <br />0 m <br /> (20 cm200 mm <br />0.2 m <br />) +
deltate;cordiform +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
membranous +
less smooth +  and tuberculate +
Spores mature in late spring–early summer. +
Amer. Naturalist +
branched +  and simple +
2(-3)-lobed +  and globose +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Isoëtes suksdorfii +
Isoëtes nuttallii +
Isoëtes +
species +
brown-streaked;completely brown +
ephemeral +, evergreen +  and perennial +