Flora of North America species comparison

40-120 cm tall, less than 2 mm thick, erect;

internodes mostly pubescent, retrorsely hirsute to strigose below the nodes.

4-30 cm tall, to 2 mm thick, erect;

internodes smooth or nodulose.

mostly glabrous, usually pubescent near the base, scabridulous distally;

ligules 0.4-1.2 mm, membranous, truncate, ciliolate;

blades 6-20 cm long, 4-10(15) mm wide, flat, glabrous and smooth abaxially, occasionally scabridulous adaxially.

shorter than the internodes, smooth to nodulose;

ligules 0.4-1.5 mm, membranous, acute, erose;

blades 0.7-3 cm long, 0.2-1.2 mm wide, arcuate-spreading, tightly involute, glabrous abaxially, hirtellous adaxially.

usually terminal, 10-33 cm long, 0.2-0.8 cm wide, exserted;

branches 1-10 cm, ascending to appressed;

pedicels 1-6 mm, strigose.

1-5 cm long, 0.1-0.5 cm wide, contracted, not dense, usually completely exserted;

branches 0.2-1.1 cm, appressed to ascending;

pedicels 0.1-1.2 mm, setulose.

2.6-4.5 mm, overlapping the next spikelet on the branch by 1/4 of its length.

1.4-2.5 mm.

subequal, 1.3-3 mm, shorter than the lemmas, 1-veined (lower glumes rarely 2- or 3-veined), tapering from near the base, bases overlapping, apices scabridulous, acute, unawned or awned, awns to 1 mm;

lemmas 2.6-4.5 mm, lanceolate to narrowly lanceolate, usually pubescent on the calluses, lower 1/3 of the midveins, and margins (hairs sometimes restricted to the callus), hairs shorter than 1.2 mm, apices acute or acuminate, usually awned, awns to 12 mm;

paleas 2.6-4.5 mm, lanceolate to narrowly lanceolate, shortly pilose on the lower portion, apices acuminate;

anthers 1.1-2.2 mm, yellowish.

equal, 0.6-1.8 mm, 1/2 - 2/3 as long as the lemmas, glabrous, 1(2, 3)-veined, acute, unawned;

lemmas 1.4-2.5 mm, lanceolate, green or purplish, midveins and margins densely villous for most of their length, hairs 0.4-1 mm, apices acute, unawned, sometimes mucronate, mucros to 0.5 mm;

paleas 1.4-2.3 mm, lanceolate, intercostal region densely villous, apices acute;

anthers 0.9-1.4 mm, yellow, dark green, or purple.

2-2.3 mm, fusiform, brown.

1-1.4 mm, ellipsoid to fusiform, dark brown.

= 40.

= 20, 40.