Flora of North America species comparison

20-90 cm, erect or decumbent, puberulent below the panicle.

50-100 cm, erect or spreading;

nodes 5-7, pilose or pubescent;

internodes glabrous.

softly pilose, hairs often retrorse or spreading;

auricles absent;

ligules 2-3 mm, glabrous, obtuse, lacerate or erose;

blades 3.5-27 cm long, 1-9 mm wide, both surfaces pilose.

13-25 cm long, 2-12 cm wide, erect to spreading;

branches 1-7 cm, stiffly erect to ascending or spreading, with 1 or 2 spikelets.

10-20 cm, open, nodding;

branches ascending or spreading.

25-70 mm, sides parallel or diverging distally, moderately laterally compressed, with 4-11 florets.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 5-10 florets.

smooth or scabrous, margins hyaline;

lower glumes 15-25 mm, 1-3-veined;

upper glumes 20-35 mm, 3-5-veined;

lemmas 20-35 mm, linear-lanceolate, scabrous, 7-veined, rounded over the midvein, margins hyaline, apices bifid, acuminate, teeth 3-5 mm;

awns 30-65 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

usually pilose or pubescent, rarely glabrous;

lower glumes 6-8 mm, 1-veined;

upper glumes 8-8.5 mm, 3-veined, mucronate;

lemmas 10-12 mm, elliptic to lanceolate, rounded over the midvein, backs and margins pilose or pubescent, apices acute to obtuse, entire;

awns 3-5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 1.5-3 mm.

sheaths pubescent or pilose, throats pilose;

upper sheaths pubescent or glabrous, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 1-2 mm, glabrous, truncate or obtuse;

blades 20-30 cm long, (4)7-11 mm wide, flat, both surfaces pilose or the abaxial surface glabrous.

= 42, 56.

= 28.