Flora of North America species comparison

1-36 cm, erect.

4.5-55 cm, erect.

usually scabridulous, occasionally smooth;

ligules 1.4-5.3 mm, abaxial surfaces scabridulous, acute, becoming lacerate;

blades (0.1) 0.25-5 cm long, 0.3-2.0 mm wide, antrorsely scabridulous, glabrous, prow-tipped.

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.

(0.5)1-4.1 cm long, 0.3-0.7 cm wide, sometimes reduced to a single spikelet in depauperate specimens;

primary branches to 1.5 cm, appressed to the rachises, antrorsely scabridulous;

pedicels 0.7-3.2 mm, enlarged at the apices.

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.

2.8-3.8 mm, green and purple-tinged;

rachillas prolonged beyond the base of the distal floret.

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.

subequal, antrorsely scabridulous, especially on the midveins;

lower glumes 2.8-3.6 mm, 1-3-veined;

upper glumes 2.7-3.8 mm, 3-veined;

callus hairs 0.3-0.5 mm;

lower lemmas 2.4-3.3 mm, apices bifid, teeth 0.3-0.5 mm, awned, awns 3-4.5 mm;

paleas 1.7-2.1 mm;

upper lemmas similar;

anthers 0.2-0.4 mm, yellow.

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.

1.3-1.7 mm long, 0.4-0.5 mm wide, glabrous, abaxial surfaces grooved 0.8-1 mm distally, adaxial surfaces grooved the entire length.

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.

= 14.

= 14.