Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

30-70 cm, erect or ascending.

pilose, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 2-4 mm, glabrous, truncate, erose or lacerate;

blades 20-35(37) mm long, 6-16 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces pilose.

often densely hairy with soft, white hairs;

ligules 1-2 mm, hairy, obtuse, erose;

blades 10-30 cm long, 3-5 mm wide, glabrous or pubescent.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

5-15 cm long, 2-9 cm wide, erect, densely contracted when immature, more open with age;

branches usually shorter than the spikelets, rigid, ascending to slightly spreading, slightly curved or straight.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets.

20-50 mm, lanceolate, terete to moderately laterally compressed, often 2+ per node;

florets 7-20, bases concealed at maturity;

rachilla internodes concealed at maturity.

pubescent;

lower glumes 6-8.5 mm, 1(3)-veined;

upper glumes 8-11.5 mm, 3-veined, not mucronate;

lemmas 10-12 mm, lanceolate, rounded over the midvein, backs pubescent, margins more densely so, apices acute, entire;

awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4 mm.

pilose;

lower glumes 5-9 mm, 3-5-veined: upper glumes 8-12 mm, 5-7-veined;

lemmas 11-20 mm long, 1.8-2.5 mm wide, lanceolate, pilose, obscurely 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 6-12 mm, to 20 mm on some distal lemmas, divaricate when mature, arising 1.5 mm or more below the lemma apices;

anthers 1-1.5 mm.

equaling or slightly shorter than the paleas, thin, weakly inrolled or flat.

= 28.

= 28, 42.