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Glyceria maxima

LHPrism Status 
Tier 1 - Threat
LHPRISM Notes 

Glyceria maxima: Reed manna grass

Plant Identification:

  • Growth form: bisexual, perennial and rhizomatous grass that are characterized as big, hairless, cespitous, and can reach 2.5 meters in height
  • Leaf: leaf sheaths have prominent midribs, visible transverse veins and are closed near the top. Leaf blades are flat but a little bit rough when large, shallowly grooved with prominent midribs, cut and pointed in the middle with short, stiff hairs on the margins
  • Flower: spikelets usually 4-9 flowered, 6-12 mm long, and compressed on the sides
  • Inflorescence: panical which can be opened or contracted and are symetrical. Branches have short, stiff hairs similar to those on the leaf margins

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