Glyceria canadensis var. laxa
Glyceria canadensis var. canadensis
limp mannagrass
Canada mannagrass, Canadian glyceria, Canadian mannagrass, glycerie du Canada, rattlesnake manna grass, rattlesnake-grass
3-5 mm, with (2)3-5 florets.
5-8 mm, with 4-10 florets.
0.6-1.3 mm;
upper glumes 1.5-2.3 mm, usually rounded, sometimes acute;
lemmas 1.8-2.5 mm.
1.6-2.4 mm;
upper glumes 1.8-2.5 mm, acute;
lemmas 2.4-4 mm.
= 60.
= 60.
Glyceria canadensis var. laxa
Glyceria canadensis var. canadensis
Glyceria canadensis var. laxa grows in swamps, bogs, and wet woods, primarily along the eastern seaboard of North America from Nova Scotia to northeastern Tennessee. It is sometimes treated as a hybrid, G. xlaxa (Scribn.) Scribn., but several specimens have dehiscent anthers and well-formed caryopses, indicating that they are not hybrids. The report of 2n = 30 is based on counts for G. xottawaensis.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Glyceria canadensis var. canadensis grows throughout the range of the species. The spikelets bear some resemblance to those of Bromus briziformis, otherwise known as rattlesnake brome, hence the vernacular name "rattlesnake mannagrass".
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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