Flora of North America species comparison

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

(10)15-30(42) cm, disarticulating at the nodes 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 densely pilose, hairs sometimes papillose-based (upper sheaths sometimes glabrous);

blades 3-8(20) cm long, 1-3 mm wide, both surfaces sparsely to densely pilose, sometimes also scabrous or hirsute (rarely glabrous).

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 1-2(3) spikelets, if more than 1, racemose;

pedicels stiff, appressed, shorter than the spikelets.

(10)14-26(30) mm.

(8)12-26 mm.

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

2.2-4 mm long, about 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 5.5-11 mm, glabrous over the back (rarely with a few scattered hairs), margins pilose (rarely glabrous), apical teeth 1.5-7 mm, acute to aristate;

awns 5.5-13 mm;

anthers to 3.5 mm.

= 36.

= 36.