Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

30-90 cm, erect or decumbent, forming distinct clumps;

nodes 2-3, glabrous or puberulent;

internodes glabrous or puberulent.

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.

glabrous or with hairs;

auricles to 1 mm on the lower leaves;

ligules 0.4-1.0 mm, glabrous or ciliate, truncate, erose;

blades 10-20 cm long, 2-3 mm wide, scabridulous, glabrous or sparsely pilose, margins sometimes ciliate.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

8-20 cm long, lax;

branches scabridulous, with 1-2 spikelets.

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

20-32 mm, lanceolate, becoming cuneate, with 5-8 florets.

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.

glabrous, sometimes scabridulous on the veins;

lower glumes 6.5-10 mm, 1(3)-veined;

upper glumes 7.5-12 mm, 3-5-veined;

lemmas 10-13 mm, oblong to lanceolate, rounded over the midvein, 7-veined, glabrous or appressed-hairy, sometimes scabridulous, apices acute, entire or minutely bifid;

awns 4-8 mm, straight or slightly spreading, arising less than 1.5 mm below the lemma apices;

anthers 2.5-5.2 mm.

= 28.

= 70.