Flora of North America species comparison

5-40 cm, usually erect.

2-15 cm, erect or decumbent.

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.

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

pedicels scabrous, lacking tumid epidermal cells.

usually not developed, if developed, 1-7 cm, diffuse, lower branches ascending, spikelets usually confined to the distal 1/3;

pedicels scabrous, usually with tumid epidermal cells.

3.5-8 mm, with 2-6 florets.

6-9 mm, with 3-6(7) florets.

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.

rounded or slightly keeled over the back, veins obscure or distinct, apices acute or obtuse;

lower glumes 1.5-2.2 mm;

upper glumes 2.3-2.8 mm;

calluses glabrous or almost so;

lemmas 3.2-3.8(4.5) mm, membranous, usually glabrous, occasionally sparsely hairy, backs rounded, 5-veined, veins obscure, not extending to the margins, apices acute or rounded, apical margins whitish, hyaline, smooth, entire;

palea veins glabrous;

anthers (1.5)2-2.5 mm, aimost always indehiscent, mature pollen rarely produced.

rarely developed.

0.4-1.5 mm, acute, obtuse, or truncate, entire;

blades 0.4-2.2 mm wide when flat, 0.2-1 mm in diameter when involute.

= 14.

= 21, 28.