Flora of North America species comparison

40-80 cm, disarticulating at the nodes when mature.

(10)30-130 cm, disarticulating at the nodes at maturity.

glabrous, rarely sparsely pilose, usually reddish above the nodes;

blades to 30 cm long, 2-4 mm wide, flexible but not curled at maturity, glabrous, sometimes scabrous, uppermost cauline blades erect to ascending.

glabrous or pilose, upper sheaths usually glabrous or unevenly pilose;

blades 10-30 cm long, (1)2-5(6) mm wide, flat to rolled or involute, glabrous or pilose, uppermost cauline blades strongly divergent to reflexed at maturity.

with (4)6-17 spikelets;

branches usually flexible, usually divergent, sometimes strongly so, after anthesis;

lower branches with 2-3 spikelets;

pedicels on the lowest branch as long as or longer than the spikelets.

usually racemose, with (2)3-6(10) widely-spreading spikelets;

branches flexible, strongly divergent to reflexed at maturity, pulvini usually present at the base;

pedicels on the lowest branch longer than the spikelets, often crinkled.

(7)10-16 mm.

(10)14-26(30) mm.

1.7-2.6 mm long, 0.7-1.1 mm wide.

2.5-4.2 mm long, 1.3-1.6 mm wide.

of middle florets about as long as wide, convex abaxially;

lemma bodies 2.5-5 mm, pilose over the back, sometimes sparsely so, margins pilose to beyond midlength, distal hairs 0.5-2 mm, apical teeth 2-4 mm, aristate, (1/2)2/3 or more as long as the lemma bodies;

awns 6-10 mm;

anthers to 2.2 mm.

of middle florets usually longer than wide, concave abaxially;

lemma bodies 5-10 mm, glabrous or sparsely pilose over the back, margins pubescent (rarely glabrous), apical teeth (2)4-6(7) mm, aristate;

awns (7)8-12 mm;

anthers to 4 mm.

= 36.

= 36.