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.

10-40 cm, erect;

internodes mostly glabrous, strigulose 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.

usually longer than the internodes, scabridulous or puberulent, keeled;

ligules 1.5-2.5 mm, membranous, acute, erose;

blades (1)2-5.5(8) cm long, 0.8-2 mm wide, usually involute, occasionally flat, scabridulous abaxially, villous 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.

14-24 cm long, 3-7 cm wide, narrowly pyramidal, open;

primary branches 2-7 cm, ascending, diverging less than 40° from the rachises;

pedicels 1-2(3) mm, usually shorter than the florets, appressed;

disarticulation above the glumes.

1.7-3.1 mm, occasionally with 2 florets.

1.7-3 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, 1.3-1.8 mm, sparsely hirsute, 1-veined;

lower glumes 1.3-1.6 mm, acuminate, sometimes awned, awns to 0.5 mm;

upper glumes 1.4-1.8 mm, wider than the lower glumes, acuminate;

lemmas (1.7)1.9-2.5 mm, lanceolate, purplish or yellowish to light brownish, appressed-pubescent on the midveins and margins, hairs to 0.5 mm, apices awned, awns 1.2-3.5 mm, delicate;

paleas 1.8-2.4 mm, oblong-elliptic, glabrous;

anthers 0.4-0.6 mm, purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.3-2.3 mm, fusiform to dorsally compressed, light brownish.

= 40.

= 40.