Flora of North America species comparison

60-120 cm, erect or spreading;

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

internodes glabrous.

80-110 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.

11-30 cm long, 4-20 cm wide, open, erect or nodding;

branches usually longer than the spikelets, ascending to widely spreading, slender, slightly curved or straight.

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

10-25 mm, lanceolate, terete to moderately laterally compressed, often purple-tinged;

florets 4-10, bases concealed or visible at maturity;

rachilla internodes concealed or 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.

glabrous;

lower glumes 4-6 mm, 3-veined;

upper glumes 5-8 mm, 5-veined;

lemmas 7-9 mm long, 1.1-1.5 mm wide, lanceolate, obscurely 7-veined, rounded over the midvein, glabrous, coriaceous, margins slightly angled, inrolled or not at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 6-11 mm, straight, arising at varying distances below the lemma apices;

anthers 2.5-5 mm.

shorter than the paleas, weakly to strongly inrolled.

sheaths with dense, soft, appressed hairs;

ligules 1-1.5 mm, hairy, obtuse, erose;

blades 10-20 cm long, 2-6 mm wide, coarsely pilose on both surfaces.

= 14.

= 14.