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.

(15)20-60 (70) cm, somewhat decumbent, 1 or more nodes exposed;

internodes hispidulous 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.

somewhat basally concentrated, most blades not reaching more than (1/4)1/2 of the plant height;

sheaths usually a little shorter than the internodes, not keeled, scabridulous, margins hyaline, basal sheaths rounded, not becoming spirally coiled when old;

ligules 2-9 mm, hyaline, acute, lacerate, often with lateral lobes;

blades 4-10(16) cm long, 1-2.2 mm wide, not arcuate, flat, folded, or involute, scabrous, often glaucous, midveins and margins not thickened, green.

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.

12-30 cm long, 5-20 cm wide, diffuse;

primary branches 1-10 cm, diverging 30-80° from the rachises, naked basally;

pedicels 1-4(6) mm.

1.7-3.1 mm, occasionally with 2 florets.

2.5-4.2 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.

equal, 1.4-2.5 mm, 1-veined, apices scabridulous, acute to acuminate, minutely erose, unawned or awned, awns to 1 mm;

lemmas 2.5-4.2 mm, narrowly elliptic, usually purplish, scabrous distally, appressed-pubescent on the lower 1/2 - 3/4 of the margins and midveins, apices acuminate, awned, awns 0.5-4.2 mm;

paleas 2.5-3.5 mm, narrowly elliptic, intercostal region sparsely pubescent, apices acuminate, with 2 short (0.1-0.2 mm) awns;

anthers 1.5-2.1 mm, greenish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.9-2.3 mm, fusiform, brownish.

= 40.

= 80, 82.