Flora of North America species comparison

10-70 cm, decumbent below;

internodes cinereous-lanate, glabrous, or scabrous for most of their length, always cinereous-lanate below the nodes.

25-80 cm, erect, wiry;

internodes mostly glabrous, strigose or glabrous below the nodes.

longer than the internodes, cinereous-lanate below, glabrous and smooth or scabridulous distally;

ligules 0.2-1 mm, densely ciliate, obtuse, with lateral lobes;

blades 2-8 cm long, 1-2.2 mm wide, flat to tightly involute, scabrous abaxially, hirsute adaxially, stiff, pungent.

scabridulous, not becoming spirally coiled when old;

ligules 1-3 mm, membranous, acuminate, deeply lacerate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, scabridulous abaxially, hirtellous or scabrous adaxially.

(7)8-16(19) cm long, (2)4-14 cm wide, open;

primary branches 1.5-8 cm, capillary, straight, lower branches diverging 70°-90° from the rachises in mature plants, often appearing fascicled in immature plants;

pedicels 10-25 mm.

4-18(20) cm long, 0.2-2.8 cm wide, contracted, not dense, sometimes interrupted below;

panicle branches 0.6-5 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-3 mm.

2.6-4.5 mm.

3-4 mm.

equal, 1.2-3 mm, purplish near the base, smooth or scabridulous distally, 1-veined, acuminate or acute, unawned or awned, awns to 1 mm;

lemmas 2.6-4.5 mm, lanceolate, purplish, scabridulous distally and on the margins, apices acuminate, awned, awns 1-1.5(2) mm, straight;

paleas 2.6-4.5 mm, lanceolate, glabrous, acuminate, 2-awned, awns to 1 mm;

anthers 1.8-2.6 mm, purplish.

unequal, 0.3-1 mm, shorter than the florets, 1-veined, unawned;

lower glumes shorter than the upper glumes, obtuse to acute, sometimes erose;

lemmas 2.8-4 mm, narrowly lanceolate, purplish, scabrous, sparsely appressed-pubescent on the calluses and lower 1/4 of the midveins and margins, hairs shorter than 0.3 mm, apices acuminate, awned, awns (10)20-40 mm;

paleas 2.6-3.9 mm, narrowly lanceolate, intercostal region sparsely pubescent on the basal 1/3, apices acuminate, scabrous;

anthers 0.9-1.6 mm, purplish.

1.8-2.5 mm, fusiform, brownish.

2-2.6 mm, fusiform, brownish.

= 26, 42, 60.

= 40.