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Sessile spikelet (5)5.5(7) mm long, elliptic-oblong; callus barbate with pallid to reddish hairs; glumes coriaceous, glossy; inferior glume reddish-brown to black, pilose on the back; superior glume pilose above the middle, glabrous and shiny below, tapering to a fine apex; inferior floret empty, its lemma c. 4 mm long and ciliate on the margins; superior floret bisexual; lemma c. 3 mm long, deeply lobed, ciliate on the lobes and margins, awned; awn c. (25)40 mm long, twisted, scabrid along the spiral; palea 0.
Short-lived perennial or annual 600-1200 mm high; culm nodes with spreading white hairs. Leaf blade 4-8 mm wide. Inflorescence narrowly oblong; primary branches whorled. Sessile spikelet 4-7 mm long; black at maturity; lower glume elliptic-oblong, hard, reddish brown to black at maturity, glossy, glabrous to loosely hairy; upper lemma awn 30-45 mm long, bent, twisted; anther 2.0-3.8 mm long. Pedicelled spikelet 3-5 mm long, linear to lanceolate, awnless, loosely hairy, green.
Annual; culms up to 250 cm high, slender; nodes with a conspicuous ring of long, spreading, silky white hairs; leaf sheaths glabrous except for a beard of long cilia at the mouth; ligule a glabrous membrane up to 3 mm long; leaf laminas 10–30 cm × up to 15 mm, hairy on both surfaces or occasionally glabrous on the superior.
An annual grass. It grows 2.5 m high. It has a ring of long spreading silky white hairs. The leaf blade is 10-30 cm long by 15 mm wide. It is hairy on both surfaces. The flower panicle is 25 cm long. The spikelets are 6 mm long.
Pedicelled spikelet neuter, (3)4(5) mm long, lanceolate, smaller than the sessile spikelet, greenish; inferior glume membranous, pilose on the back; superior glume membranous, glabrous to scabrid.
Perennial or annual, up to 1.2 m high. Leaf blades 4-8 mm wide. Nodes with spreading white hairs. Spikelets (sessile) 4-7 mm long, black at maturity.
Panicle up to 25 cm long, open; branches simple; racemes 3–7-jointed; rhachis internodes and pedicels long-pilose.
