Flora of North America species comparison

5-30 cm tall, 0.4-1 mm thick, decumbent, geniculate, or erect;

internodes usually nodulose (occasionally smooth) for most of their length, puberulent or nodulose below the nodes.

40-120 cm, erect, not conspicuously branched;

internodes mostly smooth, sometimes scabridulous below the nodes.

shorter or longer than the internodes, glabrous;

ligules 0.8-3 mm, membranous, acute to truncate, erose;

blades 0.4-6.5 cm long, 0.5-4.2 mm wide, flat or involute, straight or arcuate-spreading, glabrous abaxially, hirtellous adaxially.

longer than the internodes, smooth or scabridulous, rounded towards the base, not becoming spirally coiled when old;

ligules 2-8 mm, firm below, membranous distally, obtuse to acute;

blades 15-50 cm long, 0.3-1.5 mm wide, flat to involute, smooth or scabridulous abaxially, hirtellous adaxially.

1-15 cm long, 0.1-1.7 cm wide, exserted, narrow or spikelike, rachises usually concealed by the branches;

primary branches 0.4-5 cm, usually closely appressed at maturity, rarely diverging up to 20° from the rachises;

pedicels 0.2-2 mm, setulose.

15-50 cm long, 1-7 cm wide, loosely contracted, not dense;

primary branches 1-8 cm, appressed or diverging up to 30° from the rachises, naked basally;

pedicels 1.3-8 mm, hispidulous.

1.7-3.1 mm, occasionally with 2 florets.

3-4.2 mm.

subequal, 0.6-2 mm, 1/3– 1/2 as long as the lemmas, green, 1(2)-veined, acute, sometimes mucronate, mucros less than 0.2 mm;

lemmas 1.7-2.6(3.1) mm, lanceolate, dark greenish, plumbeous, or mottled, glabrous, apices scabridulous, acute to acuminate, sometimes mucronate, mucros to 0.5 mm;

paleas 1.2-2.4(2.9) mm, lanceolate, acute;

anthers 0.9-1.6 mm, yellow to purplish.

subequal, 2-3 mm, exceeded by the florets, glabrous below, minutely pubescent or scabridulous distally, 1-veined, acuminate to acute, unawned or awned, awns to 1.6 mm;

lemmas 2.8-4.2 mm, narrow, lanceolate, calluses hairy, hairs to 1 mm, lemma bodies glabrous and smooth below, scabridulous distally, apices acuminate, awned, awns 8-40 mm, straight to flexuous, demarcation of the awns from the lemma bodies not evident;

paleas 2.8-4.2 mm, narrowly lanceolate, glabrous, acuminate;

anthers 1.4-2.2 mm, yellow.

0.9-1.6 mm, narrowly ellipsoid, brown.

2-2.2 mm, fusiform, brownish.

= 40.

= unknown.