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.

30-100 cm tall, 0.5-2 mm thick, herbaceous, ascending or decumbent, bushy and much branched above;

internodes smooth and shiny for most of their length, scabridulous or 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.

glabrous, margins hyaline;

ligules 0.5-1.5 mm, membranous, truncate, lacerate-ciliolate;

blades 3-8 cm long, (1.5)2-4 mm wide, flat, glabrous.

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.

2-6.5 cm long, 0.2-0.8 cm wide, lobed, dense;

branches 0.3-2.5 cm, ascending, closely appressed;

axillary panicles common, partly included in or exserted from the subtending sheaths;

pedicels 0.3-2.2 mm, scabrous to strigulose.

1.7-3.1 mm, occasionally with 2 florets.

2.2-3.5 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, 1.5-3.5 mm, from 3/4 as long as to longer than the lemmas, smooth or scabridulous near the apices, 1-veined;

upper glumes acuminate, acute, unawned or awned, awns to 1.2 mm;

lemmas 2.2-3.1 mm, narrowly lanceolate, shiny, stramineous or purplish, usually completely glabrous (rarely with a few appressed hairs), apices scabridulous, acuminate, unawned;

paleas 2.2-3.1 mm, narrowly lanceolate;

anthers 0.3-0.5 mm, yellow to purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.2-1.4 mm, fusiform, brown.

= 40.

= 40.