English water grass, more...
[Glyceria spectabilis Mert. & W.D.J.Koch, more]
Etymology: Maxima (Latin) - greatest
Plants: perennial, rhizomatous, semi-aquatic grass, with unbranched stem up to 2.5 m tall
Leaves: blades flat or slightly folded, 2 cm wide x 22-29 cm long, shallowly grooved with prominent mid-ribs, apex acute, margins with stiff, short hairs; sheaths rough with reddish-brown band at the junction with the leaf
Ligule: 5 mm wide, acute at apex
Inflorescence: panicle 15-30 cm long; spikelets 5-8 mm long; glumes keeled; lemmas 3 mm long, ovate, obtuse
Habitat: meadows, streams, lakeshores
Glyceria maxima is an aggressive exotic weed.
Floristic Rating: Coefficient of Conservatism = NA WI DNR: WI invasive species facts USDA Plants Database: Federal distribution and detailed information including photos