Flora of North America species comparison

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

40-90 cm, erect;

nodes 3-5(7), mainly pubescent;

internodes mostly glabrous, puberulent near the nodes.

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.

10-25 cm, open, nodding;

branches ascending to spreading.

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

10-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 7-12(16) 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 glabrous, sometimes pubescent;

lower glumes 5-6.5(7) mm, 1(3)-veined;

upper glumes (6)7-9 mm, 3-veined, not mucronate;

lemmas 8-11 mm, elliptic, rounded over the midvein, backs and margins pubescent, sometimes nearly glabrous, apices truncate or obtuse, entire, rarely emarginate, lobes shorter than 1 mm;

awns 2-4 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 1.8-4 mm.

sheaths densely pilose or glabrous;

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

auricles absent;

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

blades 5-20 cm long, to 7 mm wide, flat, both surfaces glabrous, sometimes scabrous.

= 42, 56.

= 28.