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Densely tufted perennial; culms 40–100 cm. high, never rooting at the nodes.. Leaf-blades linear to lanceolate, 5–30 cm. long, 3–10(–30) mm. wide.. Inflorescence of 3–8(–12) racemes on an axis 5–25 cm. long; racemes 1–8 cm. long, bearing the spikelets singly on a triquetrous narrowly winged rhachis.. Spikelets elliptic, 4–6 mm. long, pubescent, subacute; lower glume 3/4 to as long as the spikelet, 11-nerved, obtuse to subacute; upper glume 7–9-nerved, with cross-veins, separated from the lower by a short internode; lower lemma 5-nerved, with prominent cross-veins; upper lemma slightly papillose, subobtuse to apiculate.
Perennial, densely tufted and rhizomatous, up to 1.2 m high. Leaf blades 50-300 mm long, 3-10(-30) mm wide. Spikelets 5-7 mm long. Racemes 4-12, secund, 10-80 mm long; spikelets arranged in 2 rows, pedicels equal; lower glume more than two-thirds the spikelet length, 7-9-nerved, separated from upper glume by a short internode; upper glume and lower lemma with cross veins between nerves.
Inflorescence of 3–8(12) racemes, these 1–8 cm. long, bearing spikelets singly on a triquetrous rhachis.
Leaf laminae 3–15(30) mm. wide, linear to lanceolate.
Culms 40–120 cm. high, never rooting at the nodes.
Spikelets as for B. humidicola.
Densely tufted perennial.
