Isoëtes acadiensis
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
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"
separating +
Acadian quillwort +
rounded +
alternating +
vascular +
surrounding +
vascular +
several +
Present +
septate +
longitudinal +
simple +
arranged +
straight +
evergreen +
pliant +
recurved;erect;spreading +
surrounding +
tapering +
deltate;cordiform +
membranous +
exposed +
endosporic +
trilete +
white +
globose +
9-celled +
monolete +
spinulose +
reniform +
textured +
brownish +
several +
fibrous +
hardened +
converging +
Canad. J. Bot. +
1981 +
arising +
cormlike +
brown +
proliferous +
hardened +
multitailed +
brown-streaked +
Isoëtes acadiensis +
Isoëtes +
species +
covering +
brown-streaked;completely brown +
submerged +
heterosporous +