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.

1.3-2.6 mm, spreading, divergent from the secondary branches, silvery-green.

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.

equal to subequal, 1.3-2.6 mm, 1-3-veined, subobtuse, usually denticulate, often mucronate;

lower lemmas 1.3-1.9 mm, usually unawned;

upper lemmas 1.3-2 mm, apices bifid, awned, awns 1.8-2.5 mm, geniculate;

paleas 0.9-1.4 mm;

anthers 0.2-0.4 mm, yellow 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.

about 1 mm long, 0.3-0.4 mm wide, glabrous.

2.8-6.5 mm, usually 1-3 times as long as the spikelets, abruptly thickened at the apices.

= 14.