Flora of North America species comparison

60-120 cm, erect or spreading;

nodes (3)4-6(7), usually pilose;

internodes glabrous.

50-100 cm, erect or spreading;

nodes 5-7, pilose or pubescent;

internodes glabrous.

pilose or glabrous;

auricles absent;

ligules 2-6 mm, glabrous, obtuse or truncate, erose or lacerate;

blades 13-25(33) cm long, to 14 mm wide, flat, abaxial surfaces usually glabrous, sometimes pilose, adaxial surfaces usually pilose, sometimes glabrous.

10-15 cm, open;

branches ascending to drooping.

10-20 cm, open, nodding;

branches ascending or spreading.

15-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (3)4-9 florets.

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

glabrous or pilose;

lower glumes 5-8 mm, 1(3)-veined;

upper glumes 8-12 mm, 3-veined;

lemmas 8-15 mm, lanceolate, rounded over the midvein, backs sparsely hairy or glabrous, margins usually coarsely pubescent, sometimes glabrous, apices subulate to acute, entire;

awns (4)6-12 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4 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.

= 14.

= 28.