Flora of North America species comparison

10-80 cm, erect, rounded near the base;

internodes glabrous.

12-36 cm tall, 0.3-0.5 mm thick, often clumped, usually erect, somewhat decumbent at the base;

internodes mostly or completely glabrous, sometimes strigose below the nodes.

smooth or scabridulous, becoming flattened, papery, and occasionally spirally coiled when old, lower sheaths longer than the internodes;

ligules 4-14(20) mm, membranous, acute to acuminate;

blades 6-25 cm long, 1-2.5 mm wide, flat, becoming involute, scabrous abaxially, hirsute adaxially.

shorter than the internodes, hirtellous near the margins;

ligules 0.9-1.2 mm, membranous, truncate to obtuse, erose;

blades 0.2-3.7 cm long, 0.2-1 mm wide, tightly involute, straight to arcuate, smooth or scabridulous abaxially, hirtellous adaxially.

4-25 cm long, (1)2-6 cm wide, not dense;

primary branches 0.5-10 cm, appressed or diverging up to 40° from the rachises;

pedicels 0.5-6.5 mm, scabrous.

0.7-5.5 cm long, 0.2-0.7 cm wide, contracted, not dense, sometimes interrupted below;

primary branches 0.4-1.8 cm, appressed;

pedicels 0.1-4 mm.

3-7 mm.

2.6-4 mm.

subequal, (1)1.5-3.2(4) mm, smooth or scabridulous distally;

lower glumes 1-veined, sometimes with a less than 1 mm awn;

upper glumes 1/3–2/3 as long as the lemmas, 3-veined, truncate to acute, 3-toothed, teeth sometimes awned, awns to 1.6 mm;

lemmas 3-4.5(7) mm, lanceolate, loosely to densely appressed-pubescent on the lower portion of the mid-veins and margins, hairs to 0.8 mm, apices acute to acuminate, awned, awns (2)6-25 mm, flexuous;

paleas 3-4.5(7) mm, lanceolate, acute to acuminate;

anthers 1.5-2.3 mm, purplish.

subequal, 1.6-3 mm, 1-veined, scabridulous on the veins, acute, unawned;

lemmas 2.6-4 mm, lanceolate, hairy on the lower 3/4, hairs to 1.2 mm, tawny, apices acuminate, unawned or awned, awns to 1 mm;

paleas 2.6-4 mm, lanceolate, intercostal region tawny pubescent;

anthers 2.1-2.3 mm, yellowish-purple.

1.8-2 mm, fusiform, light brown.

2-2.2 mm, fusiform, light brownish.

= 20, 40.

= unknown.