Flora of North America species comparison

(30)50-110 cm, clumped, erect, glabrous or pubescent.

7-30 cm, glabrous, erect, spreading, or geniculate.

somewhat inflated, glabrous or villous;

blades to 10 cm long, to 3 mm wide, flat, subglabrous to villous.

2-3 per culm;

sheaths scabridulous or pilose;

ligules 1.5-3 mm, truncate, erose to lacerate;

blades (8.5)15-20+ cm long, (3)7-12 mm wide, flat, ascending, lax at maturity, often scabridulous.

10-30 cm long, (1)2-9 cm wide, open, nodding, green or tan, occasionally purple-tinged;

branches 2-12+ cm, most, except sometimes the uppermost, spikelet-bearing only towards the apices, with the basal (1/5)1/3-1/2 bare, filiform, flexuous, at least the lowest 1-3 whorls spreading or drooping.

1-5 cm long, 0.5-3 cm wide, pyramidal to ovoid, dense, shiny, yellowish to tan.

6-12 mm, subsessile to pedicellate, pedicels to 2 cm, usually with 2-3 functional florets below 1-2 reduced florets;

rachilla internodes and hairs 1-2.5 mm;

disarticulation above the glumes, beneath the florets.

2.5-3.5 mm, with 2-3 florets.

unequal;

lower glumes 0.75-2(3) mm, subulate;

upper glumes 3.5-5 mm long, shorter than the lowest florets, 2-3 times as wide as the lower glumes, widest at or above the middle, ovate or obovate, rounded to the acuminate apices;

callus hairs to 1 mm;

lemmas 5-6 mm, broadly lanceolate, glabrous, bifid, teeth to 1.3 mm, awned, awns (7)9-14 mm, arising from above midlength to just below the teeth, exceeding the lemma apices, arcuate to flexuous;

paleas shorter than the lemmas;

anthers about 1 mm.

unequal;

lower glumes 2-2.5 mm long, narrower than the upper glumes, 1-veined;

upper glumes 2.5-3 mm, 3-veined;

callus hairs 0.3-0.4 mm;

lemmas 1.6-2.7 mm, glabrous or hairy, with wide hyaline margins, apices bifid, teeth to about 0.5 mm, awned, awns 2-6 mm, arising from above midlength and exceeding the apices, slightly bent;

anthers 1-1.5 mm.

2.5-3.2 mm, densely to sparsely pubescent.

= 42.

= unknown.