Flora of North America species comparison

25-85 cm tall, 0.9-1.7 mm thick, ascending;

internodes glabrous for most of their length, scabrous to strigose below the nodes.

10-50 cm tall, 0.4-1 mm thick, decumbent;

internodes glabrous or strigulose.

scabridulous, especially basally;

ligules 0.5-1.5 mm, membranous, truncate, lacerate to ciliate;

blades 4-16 cm long, 2-4(5) mm wide, flat, scabrous abaxially, pubescent adaxially.

shorter than the internodes, strigulose or glabrous, usually without necrotic spots, not becoming spirally coiled when old;

ligules 1-2 mm, membranous throughout, obtuse, strigulose or glabrous, erose or toothed, with lateral lobes, lobes less than 1.5 mm longer than the central portion;

blades 1-6 cm long, 1-2 mm wide, flat to involute, smooth or scabridulous abaxially, hirsute adaxially, usually without necrotic spots.

2-15 cm long, 0.5-2.8 cm wide, contracted, dense;

primary branches 0.5-5 cm, appressed to strongly ascending;

pedicels 0.5-1.5 mm, appressed, strigose.

4-13 cm long, 1-3(5) cm wide, not dense;

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

pedicels 0.1-3 mm.

2-4 mm.

3.5-5 mm.

equal to subequal, 2-4 mm, subequal to or longer than the florets, 1-veined, veins scabridulous, apices acuminate to awn-tipped;

lemmas 2-3.5 mm, lanceolate, grayish-green, hairy on the calluses and lemma bases, hairs 2-3.5 mm, apices acuminate, awned, awns 1-10 mm;

paleas 2-3.5 mm, lanceolate, bases with silky hairs between the veins, apices acuminate;

anthers 0.4-1.5 mm, yellow.

subequal, 2-4 mm, exceeded by the florets, 1-veined, scabrous on the veins and near the apices, apices acuminate, unawned or awned, awns to 1.2 mm;

lemmas 3.5-5 mm, lanceolate, mostly purplish, veins conspicuously green, pubescent on the lower 1/3-1/2 of the midveins and margins, hairs to 1.5 mm, apices scabridulous, acuminate, awned, awns 4-12(20) mm, flexuous;

paleas 3.5-5 mm, narrow-lanceolate, intercostal region pubescent, apices acuminate, veins sometimes extending into awns to 0.5 mm;

anthers 1.3-3 mm, purple.

0.9-1.1 mm, cylindrical, yellowish-brown.

2-2.3 mm, fusiform, brownish.

= 20.

= unknown.