Flora of North America species comparison

4.5-55 cm, erect.

scabridulous, occasionally smooth;

ligules 1.2-8 mm, abaxial surfaces scabridulous, acute to subobtuse, becoming lacerate;

blades 0.3-13.5 cm long, 0.3-2.5 mm wide, antrorsely scabridulous, glabrous, apices prow-tipped.

1.2-13.5 cm long, 1.5-10 cm wide, open;

primary branches to 7.3 cm, ascending to divergent, antrorsely scabridulous, occasionally smooth;

pedicels 0.9-11.3 mm, apices enlarged.

1.7-3.3(3.5) mm, silvery-green to stramineous or purplish;

rachillas usually not prolonged beyond the base of the distal floret, sometimes prolonged, vestigial.

1.7-2.5 mm, spreading, divergent from the secondary branches, often purplish to reddish-purple-tinged;

rachillas not prolonged or vestigial.

subequal to equal, 1.3-3.3(3.5) mm, scabridulous on the upper 1/2;

callus hairs 0.2-0.4 mm;

lemmas 1.3-2.6 mm, apices bifid, sometimes only the upper lemma awned, awns 2.1-3.9 mm, straight or geniculate;

paleas 0.9-1.7 mm;

anthers 0.2-0.5 mm.

subequal, 1.7-2.5 mm, 1-veined, acute;

lower lemmas 1.3-1.8 mm, apices bifid, teeth to 0.1 mm, awns absent or to 2.6 mm, straight or geniculate;

lower paleas 1-1.3 mm;

upper lemmas 1.7-2.1 mm, apices bifid, teeth 0.2-0.4 mm, awned, awns 2.1-3 mm, geniculate;

upper paleas 1-1.3 mm;

anthers 0.2-0.4 mm, yellow-orange or purple.

0.9-1.5 mm long, 0.3-0.5 mm wide, abaxial surfaces grooved in the distal 1/2, adaxial surfaces grooved the entire length.

0.9-1.2 mm long, about 0.3 mm wide, glabrous.

2-11.3 mm, usually 2-8 times as long as the spikelets, gradually thickening to the apices.

= 14.