Isoëtes acadiensis
Canad. J. Bot. 59: 2592. 1981.
Common names: Acadian quillwort
Treatment appears in FNA Volume 2.
Revision as of 20:51, 16 December 2019 by FNA>Volume Importer
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
N.B., Nfld., N.S., Mass., Maine, N.H., N.Y.
Discussion
Selected References
None.
Lower Taxa
None.