Eragrostis mexicana

Tufted annual, culms ascending or erect, to 110 cm high. Leaves glabrous or very lightly sprinkled with fine hairs; blade usually flat, to 20 cm long and 8 mm wide. Inflorescence an open panicle, to c.30 cm long and 18 cm wide, lower branches usually solitary or opposite, their axils glabrous or ciliate; pedicels mostly longer than or about as long as spikelets. Spikelet 3–16-flowered, 2–9 mm long and 1.3–2.5 mm wide, light green to grey-green; glumes acute, 0.8–2 mm long, subequal or more often, the upper c. 0.5 mm longer than the lower, scabrous along the keel; lemma 1.3–2.5 mm long, acute to obtuse; palea subequal to lemma. Anthers c. 0.3 mm long.