Flora of North America species comparison

5-60 cm, erect to decumbent.

5-40 cm, usually erect.

basally concentrated;

ligules 0.8-2.2 mm, obtuse to acute, mostly entire, sometimes slightly erose;

blades involute, 1.2-1.9 mm wide when flattened.

2.5-20 cm, diffuse at maturity, lower branches horizontal to descending, spikelets usually confined to the distal 2/3, pedicels scabrous, lacking tumid epidermal cells.

2-18 cm, compact to diffuse at maturity, lower branches ascending to descending, usually spikelet-bearing to the base;

pedicels scabrous, lacking tumid epidermal cells.

2.5-7 mm, with 2-7 florets.

3.5-8 mm, with 2-6 florets.

rounded over the back, veins obscure, apices acute to truncate;

lower glumes 0.4-1.3 mm;

upper glumes 0.9-1.8 mm;

calluses with a few hairs;

lemmas 1.5-2(2.2) mm, mostly herbaceous, glabrous or sparsely hairy on the lower 1/2, principally along the veins, backs rounded, 5-veined, veins obscure, not extending to the margins, apical margins hyaline and often yellowish, uniformly and densely scabrous, apices widely obtuse to truncate, entire;

palea veins shortly ciliate proximally, glabrous, sometimes scabrous distally;

anthers 0.4-0.8 mm.

rounded over the back, veins obscure, apices acute to obtuse;

lower glumes 0.7-1.5 mm;

upper glumes 1.4-3 mm;

calluses with a few hairs;

lemmas 2.4-4 mm, herbaceous, mostly smooth, usually glabrous, sometimes with a few hairs near the base, principally along the veins, backs usually rounded, sometimes weakly keeled distally, 5-veined, veins obscure, midveins often slightly scabrous and prominent in the distal 1/2, often extending to the apical margins, lateral veins not extending to the margins, apical margins ranging from smooth to scabrous, entire, not white, apices acute, entire;

palea veins glabrous or shortly ciliate proximally, uniformly scabrous distally;

anthers 1-2 mm.

0.8-1.2 mm, obtuse to truncate, usually entire;

blades 1-7 mm wide, flat to involute.

= 14, 28, 42.

= 14.