Flora of North America species comparison

30-70 cm tall, 0.7-1 mm thick, erect, geniculate and rooting at the lower nodes;

internodes mostly glabrous, sometimes glaucous, often striate below the nodes.

usually shorter than the internodes, smooth or scabridulous, usually with dark brown necrotic spots, flat and spreading at maturity;

ligules 1-2.5(5) mm, membranous, obtuse, with lateral lobes 1.5-3 mm longer than the central portion;

blades (1)5-12(15) cm long, 0.5-1.5 mm wide, flat to involute, glabrous and smooth abaxially, scabridulous adaxially, often with dark brown necrotic spots.

(2)5-15 cm long, 0.5-2.8 cm wide, contracted, interrupted below;

primary branches 0.5-4(6) cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-3 mm, scabrous.

3.5-5.5 mm, occasionally with 2 florets.

equal, 1.5-3.5 mm, shorter than the lemmas, 1-veined, acuminate to acute, often erose, unawned or awned, awns to 2.2 mm;

lemmas 3-5.5 mm, lanceolate, often purplish, mostly glabrous, calluses with a few short hairs, apices acuminate, scabridulous, awned, awns (5)7-25 mm, flexuous;

paleas 3-5.5 mm, lanceolate, glabrous, acuminate;

anthers 1.5-2.1 mm, yellowish or purplish.

2-2.5 mm, fusiform, brownish.

= unknown.