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.

100-300 cm tall, 3-6 mm thick, erect or ascending, woody below, branching at the middle and upper nodes, branches numerous, fascicled, and spreading;

internodes glabrous for most of their length, puberulent or glaucous 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, enlarged and flattened basally, somewhat chartaceous;

ligules 0.2-0.6 mm, membranous, truncate;

blades of the branch leaves 1.2-8(12) cm long, 0.7-2.2 mm wide, flat or involute, glabrous abaxially, hirtellous adaxially;

blades of the cauline leaves, particularly the lower cauline leaves, absent or greatly reduced.

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.

numerous, terminal on the main culms and the branches, 1-4 cm long, 0.3-1.4 cm wide, lax, inconspicuous;

primary panicle branches appressed or loosely spreading up to 40° from the rachises;

pedicels 0.1-1.5 mm.

1.7-3.1 mm, occasionally with 2 florets.

2.2-3.1 mm, green or purplish.

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, 1-1.7 mm, glabrous, 1-veined, acute to acuminate, occasionally mucronate, mucros to 0.5 mm;

lemmas 2.3-3.1 mm, lanceolate, appressed-pubescent on the calluses and lower portion of the margins, apices acuminate, awned, awns 1-5 mm, flexuous;

paleas 2.3-3.1 mm, narrowly lanceolate, appressed-pubescent basally, acuminate;

anthers 1.5-2 mm, purplish.

0.9-1.6 mm, narrowly ellipsoid, brown.

1.2-1.6 mm, fusiform, reddish-brown.

= 40.

= 40.