Flora of North America species comparison

60-120 cm, erect or spreading;

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

internodes glabrous.

20-80 (120) cm, erect.

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.

5-23 cm long, 2.5-12 cm wide, open, nodding;

branches spreading to ascending;

lower branches slightly drooping, often secund after anthesis, not sinuous.

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

10-20 mm, shorter than at least some panicle branches, ovoid-lanceolate or ovate, laterally compressed, not purple-tinged;

florets 4-9(10), ascending-spreading after flowering, bases visible at maturity;

rachilla internodes visible at maturity.

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.

scabrous or glabrous;

lower glumes 4-6 mm, 3-5-veined;

upper glumes 6-7 mm, 7-veined;

lemmas 6.5-8.5(10) mm long, 1.7-2.5 mm wide, elliptic, coriaceous, obscurely 7-veined, rounded over the midvein, backs usually glabrous, sometimes pubescent, scabrous to puberulent on the margins and near the apices, margins evenly rounded, inrolled at maturity, apices acute to obtuse, bifid, teeth shorter than 1 mm;

awns (0)3-6(9.5) mm, straight or flexuous, arising less than 1.5 mm below the lemma apices;

anthers 1-2 mm.

equaling the paleas, thick, strongly inrolled at maturity.

sheaths glabrous or loosely pubescent and glabrate;

ligules 2-3 mm, glabrous, obtuse;

blades 15-30 cm long, 2-4 mm wide, abaxial surfaces pilose or glabrous, adaxial surfaces pilose.

= 14.

= 28.