Isoëtes acadiensis

Kott

Canad. J. Bot. 59: 2592. 1981.

Common names: Acadian quillwort
Treatment appears in FNA Volume 2.

Plants aquatic, submerged. Rootstock nearly globose 2 (–3) -lobed. Leaves evergreen, olive green to reddish-brown, pale toward base, spirally arranged, to 20 cm, pliant, gradually tapering to tip. Velum covering less than 1/2 of sporangium. Sporangium wall brown-streaked. Megaspores white, 400-650 μm diam., rugulate to reticulate with ridges having rounded or smooth crests; girdle smooth. Microspores gray in mass, 25–35 μm, spinulose. 2n = 44.


Phenology: Spores mature in late summer.
Habitat: Emergent or in shalow water of slightly acid lakes, ponds, and streams

Distribution

V2 632-distribution-map.gif

N.B., Nfld. and Labr. (Nfld.), N.S., Mass., Maine, N.H., N.Y.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Isoëtes acadiensis"
several +  and 1 +
W. Carl Taylor +, Neil T. Luebke +, Donald M. Britton +, R. James Hickey +  and Daniel F. Brunton +
Acadian quillwort +
rounded +
alternating +
N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Mass. +, Maine +, N.H. +  and N.Y. +
Emergent or in shalow water of slightly acid lakes, ponds, and streams +
pale +, olive green +  and reddish-brown +
straight +
evergreen +
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 reticulate +
Spores mature in late summer. +
Canad. J. Bot. +
branched +  and simple +
2(-3)-lobed +  and globose +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Isoëtes acadiensis +
Isoëtes +
species +
brown-streaked;completely brown +
ephemeral +, evergreen +  and perennial +