Flora of North America species comparison

25-85 cm tall, 0.9-1.7 mm thick, ascending;

internodes glabrous for most of their length, scabrous to strigose below the nodes.

40-100 cm, erect, not conspicuously branched;

internodes mostly smooth, sometimes scabridulous below the nodes.

scabridulous, especially basally;

ligules 0.5-1.5 mm, membranous, truncate, lacerate to ciliate;

blades 4-16 cm long, 2-4(5) mm wide, flat, scabrous abaxially, pubescent adaxially.

longer than the internodes, smooth or scabridulous, basal sheaths rounded, not becoming spirally coiled when old;

ligules (1)3-12(15) mm, firmer basally than distally, obtuse to acute, often lacerate;

blades 12-35 cm long, 1-3 mm wide, flat or involute, smooth or scabridulous abaxially, scabridulous or hirtellous adaxially.

2-15 cm long, 0.5-2.8 cm wide, contracted, dense;

primary branches 0.5-5 cm, appressed to strongly ascending;

pedicels 0.5-1.5 mm, appressed, strigose.

10-35 cm long, 2-5(12) cm wide, loosely contracted to open, purplish;

primary branches 0.4-10 cm, lax, capillary, usually appressed to ascending, occasionally diverging up to 80° from the rachises, naked basally;

pedicels 1-10 mm.

2-4 mm.

3.5-5 mm, purplish.

equal to subequal, 2-4 mm, subequal to or longer than the florets, 1-veined, veins scabridulous, apices acuminate to awn-tipped;

lemmas 2-3.5 mm, lanceolate, grayish-green, hairy on the calluses and lemma bases, hairs 2-3.5 mm, apices acuminate, awned, awns 1-10 mm;

paleas 2-3.5 mm, lanceolate, bases with silky hairs between the veins, apices acuminate;

anthers 0.4-1.5 mm, yellow.

equal, 1-1.7(2) mm, exceeded by the florets, usually glabrous, sometimes mostly hirtellous but glabrous distally, 1-veined, obtuse to subacute, unawned;

lemmas 3.5-5 mm, narrowly lanceolate, purplish, calluses hairy, hairs to 0.5 mm, lemma bodies scabridulous to scabrous, apices acuminate, awned, awns 10-22 mm, clearly demarcated from the lemma bodies, flexuous;

paleas 3.5-5 mm, narrowly lanceolate, scabridulous, acuminate;

anthers 1.7-2.3 mm, purplish.

0.9-1.1 mm, cylindrical, yellowish-brown.

2-3.5 mm, fusiform, brownish.

= 20.

= 40, 44.