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Perennial (to subperennial), hydrophyte, rhizomatous, and stoloniferous (erect or decumbent), up to 0.6 m high. Leaf blades 50-120 mm long, 3-5 mm wide, slender leaves mainly cauline. Spikelets 2.0-3.5 mm long. Inflorescence closely associated with uppermost leaf, narrow and sparsely branched, ascending; lower glume broadly ovate; upper glume and lower lemma 7-nerved; lower floret usually male, lemma with broadest interspaces of nerves adjacent to central nerve, and palea well developed; female-fertile (upper) lemma pale, shiny.
Perennial to short-lived perennial; up to 0.6 m high; hydrophyte; rhizomatous; stoloniferous. Culms erect or decumbent. Leaf blades 50-120 x 3-5 mm; slender; leaves mainly cauline. Flowers: panicle closely associated with uppermost leaf; narrow and sparsely branched; ascending; spikelets 2.0-3.5 mm long; lower glume broadly ovate; upper glume and lower lemma 7-nerved; lower floret usually male; lemma with broadest interspaces of nerves adjacent to central nerve; palea well developed; upper female-fertile lemma pale; shiny.
