Tristachya viridearistata (J.B.Phipps) Clayton

Annual; culms 50–80 cm. high, slender.. Leaf-blades flat, 15–40 cm. long, 2–7 mm. wide.. Panicle linear, 5–15 cm. long, ± secund, comprising 3–15 triads borne upon slender sharply reflexed branches; pedicels connate.. Spikelets narrowly lanceolate, 20–33 mm. long, yellowish, the lower glume pilose from dark purplish tubercles; lower glume narrowly lanceolate, 1/2-2/3 as long as the spikelet; upper glume very narrowly lanceolate, as long as the spikelet, the lower lemma 1/3–1/2 as long; upper lemma turbinate at maturity, 7 mm. long, densely pilose from vertical lines of rufescent hairs, bidentate, the teeth drawn out into bristles 5–10 mm. long; central awn 3.5–6.5 cm. long, deciduous above the sinus; callus 1–1.5 mm. long.. Caryopsis hairy on top.