Isoëtes bolanderi

Engelmann

Amer. Naturalist 8: 214. 1874.

Common names: Bolander's quillwort
Synonyms: Isoëtes bolanderi var. parryi Engelmann Isoëtes californica Engelmann Isoëtes pygmaea
Treatment appears in FNA Volume 2.

Plants aquatic, occasionally emergent. Rootstock nearly globose, 2-lobed. Leaves deciduous, bright green, pale-brown toward base, spirally arranged, to 20 cm, pliant, abruptly tapering to fine tip. Velum covering less than 1/2 of sporangium. Sporangium wall ± brown-streaked. Megaspores white, 300–500 μm diam., rugulate to tuberculate; girdle obscure. Microspores brown in mass, 20–30 μm, spinulose. 2n = 22.


Phenology: Spores mature late summer.
Habitat: Alpine or subalpine lakes and ponds

Distribution

V2 308-distribution-map.gif

Alta., B.C., Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Small plants with leaves less than 2.5 cm have been called Isoëtes bolanderi var. pygmaea (Engelmann) Clute.

Isoëtes bolanderi hybridizes with I. echinospora and I. occidentalis.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Isoëtes bolanderi"
several +  and 1 +
W. Carl Taylor +, Neil T. Luebke +, Donald M. Britton +, R. James Hickey +  and Daniel F. Brunton +
Engelmann +
Bolander's quillwort +
alternating +
Alta. +, B.C. +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
Alpine or subalpine lakes and ponds +
pale-brown +  and bright 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 +
rugulate +  and tuberculate +
Spores mature late summer. +
Amer. Naturalist +
branched +  and simple +
2-lobed +  and globose +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Isoëtes bolanderi var. parryi +, Isoëtes californica +  and Isoëtes pygmaea +
Isoëtes bolanderi +
Isoëtes +
species +
brown-streaked;completely brown +
ephemeral +, evergreen +  and perennial +