Poaceae

Pooideae
Aveneae
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Hainardieae
Meliceae
Glyceria
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Panicoideae

Arundinoideae

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Dissections:
Glyceria striata

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GLYCERIA R.Br. Mannagrass
Plants hermaphroditic, caespitose or rhizomatous or stoloniferous, perennial. Culms erect or ascending or decumbent (rooting at lower nodes), glabrous; internodes hollow, terete. Leaves mostly basal, not distinctly distichous; sheaths terete, margins connate most or part of the length; auricles absent; ligules membranous; blades flat or folded, linear, lax. Panicles open or narrow or contracted, primary branches spreading or ascending or appressed (frequently drooping). Spikelets solitary, laterally compressed (linear to ovate), disarticulation above glumes, awnless, sessile or subsessile or pedicellate; florets 4-12, reduced floret at apex, callus glabrous, rachilla not extended above the upper florets; glumes 2, 1-3-veined, unequal, shorter than first floret, glabrous, awnless; lemmas 5-9-veined (rounded on buck), membranous or chartaceous, glabrous, apex usually entire, awnless, veins glabrous (uniformly developed, equally spaced and not converging at apex); paleas strongly 2-veined, (often longer than lemmas) awnless, glabrous. Stamens 3; anthers yellow rarely purple. Canyopses with pericarp free, laterally compressed. Base chromosome x=10.

A temperate genus of about 40 species, mostly adapted to hydric environments in temperate to subartic regions. These species provide food and cover for birds in wetlands. Several species are desirable livestock forages.