Tufted annual; culms 20–120 cm. high.. Leaf-blades 5–30 cm. long, 4–10 mm. wide, folded; ligule a line of hairs.. Inflorescence oblong to linear, 2–20 cm. long, the spikelets borne singly (lower glume adaxial) in 2 rows on appressed or spreading racemes 1–6 cm. long.. Spikelets ovate-elliptic, 3–4 mm. long, scaberulous to spinulose, the basal callus produced into a globular wrinkled stipe 0.3–0.6 mm. long; lower floret barren, acute; upper lemma 3–4 mm. long, rostrate, its palea obtuse and reflexed.
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