Flora of North America species comparison

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

10-50(70) cm, not disarticulating at maturity.

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.

usually glabrous;

blades 5-10 cm long, 1-3.5 mm wide, glabrous or slightly pilose.

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.

with (4)5-10 spikelets;

branches stiff, appressed or strongly ascending;

lower branches with (1)2-3(5) spikelets;

pedicels on the lowest branch shorter than the spikelets.

(10)14-26(30) mm.

11-15(19) mm.

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

(2)2.3-3 mm long, 0.7-1.1 mm wide.

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.

of middle florets longer than wide, concave abaxially;

lemma bodies 3-6 mm, glabrous over the back, densely pilose along the margins, teeth 1.5-2.5 mm, acute to acuminate or aristate;

awns 6.5-8 mm;

anthers usually tiny, sometimes to 4 mm.

rarely produced.

= 36.

= 36, 98.