Flora of North America species comparison

5-60 cm, erect to decumbent.

7-40 cm, erect to ascending.

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.

2-13 cm, compact to diffuse at maturity, lower branches erect to descending, spikelet-bearing from near the base or confined to the distal 1/2;

pedicels smooth or with a few scattered scabrules, sometimes with tumid epidermal cells.

2.5-7 mm, with 2-7 florets.

3-8 mm, with (1)2-5 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 or weakly keeled over the back, veins obscure, apices acute to obtuse;

lower glumes 0.8-1.9 mm;

upper glumes 1.7-2.5 mm;

calluses with a few hairs;

lemmas 2.4-3.3 mm, herbaceous, glabrous or with a few hairs near the base, principally along the veins, backs rounded or weakly keeled distally, 5-veined, veins obscure, not extending to the margins, apical margins uniformly and densely scabrous, apices acute to obtuse, entire;

palea veins smooth and glabrous proximally, smooth or scabrous distally;

anthers 1.5-2 mm.

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

blades 1-7 mm wide, flat to involute.

1.5-2.7 mm, obtuse, entire or minutely and irregularly serrate;

blades involute, 1.4-2.2 mm wide when flattened.

= 14, 28, 42.

= unknown.