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.

10-30(40) cm, decumbent, terete to somewhat compressed-keeled near the base;

internodes 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.

about 1/2 as long as the internodes, margins hyaline;

ligules 0.5-2 mm, hyaline, with lateral, 1-2 mm lobes;

blades 0.7-4(6) cm long, 0.5-1.7 mm wide, flat, occasionally folded, tapering, scabrous abaxially, strigulose adaxially, margins and midveins thickened, whitish, apices narrow, often sharp.

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.

5-15 cm long, 4-14 cm wide, broadly ovoid, open;

primary branches 2-8 cm, capillary, straight to slightly flexuous, diverging 45-80(100)° from the rachises, never appearing fascicled, naked proximally;

pedicels 1-11 mm, usually longer than the spikelets.

1.7-3.1 mm, occasionally with 2 florets.

1.5-2.6 mm, occasionally with 2 florets.

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, 0.9-2 mm, 1-veined, usually acute to acuminate, occasionally erose and mucronate, mucros to 0.2 mm;

lemmas 1.5-2.5 mm, lanceolate to oblong-elliptic, plumbeous to purplish, sparsely appressed-pubescent on the lower 1/2 of the margins and midveins, hairs to 0.3 mm, apices acute to obtuse, sometimes shallowly bilobed, mucronate, mucros to 0.3 mm;

paleas 1.5-2.6 mm, lanceolate, glabrous, obtuse to acute;

anthers 1-1.5 mm, yellowish to purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1-1.3 mm, elliptic, brownish.

= 40.

= unknown.