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Robust, densely tufted perennial to 3000 mm high; leaves mostly basal, to 1/2 the height of the culm. Leaf blade 1000-1500 x 9-12 mm, apex not setaceous, bright green, with cutting margins and midrib, flat or only slightly V-shaped in cross section. Inflorescence 600-800 mm long, extending well above the leaves, yellowish or purple, branches flexuous. Spikelet female only, florets (1-2)3-5, rachilla purple; glumes approximately equal, 9-13 mm long, 1-nerved, nerves purple; lemma 8-11(15) mm long, 3-nerved, nerves purple, densely hairy, hairs 7-9 mm long; palea glabrous, 3-5 mm long; anther minute, less than 0.25 mm long. Reproduces by agamospermy.
Only female plants known. Culms 4.5 m high; internodes hollow. Leaves: sheath not waxy; blade 1.5 m long, 5–20 mm wide, drooping, flat, with a distinct keel at least on lower leaves, without distinct secondary veins, bright green. Inflorescences well exserted beyond leaves, open, with 500–1000 spikelets, pink to purplish, drying grey. Female spikelets 12–15 mm long, with 3–5 florets; glumes substantially exceeding florets, similar, grey to white; lower glume 10–12 mm long; lemma 11–15 mm long, entire, villous, awnless, with nerves initially pink to purple and all reaching apex; palea linear to lorate, 4–5 mm long, glabrous between keels.
Perennial, tufted (densely), up to 3 m high. Leaf blades 1000-1500 mm long, 9-12 mm wide, leaves robust, mostly basal, up to half the height of culm, bright green, with cutting margins and midrib, flat or only slightly V-shaped in cross section, tips not setaceous. Panicle 600-800 mm long; with (1 or 2)3-5 florets per spikelet, all florets female only; glumes approximately equal, 9-13 mm long; glume veins, rhachises and rhachillas purple; lemmas 8-11(15) mm long.
