Flora of North America species comparison

30-150 (200) cm, glabrous or pubescent, sometimes scabrous.

60-150(200) cm, densely pubescent for less than 5 mm below the nodes, particularly the upper nodes.

closed for less than 1/3 their length, persistent, glabrous or pilose, smooth or scabrous, sometimes scabrous or pilose only distally or on the distal margins;

collars usually densely pubescent or with a few hairs at the margins, sometimes glabrous;

ligules 0.2-5 mm, usually ciliate, abaxial surfaces puberulent;

blades 1-6.5 mm wide, conduplicate, convolute, or flat, 0.5-2(2.5) mm in diameter when convolute, deciduous, abaxial surfaces scabrous or smooth, glabrous or the bases pubescent, adaxial surfaces puberulent to pubescent, veins 9-15(17), ribs (3)5-15(17);

abaxial sclerenchyma forming more or less continuous bands, sometimes reduced to small strands;

adaxial sclerenchyma sometimes present;

girders or pillars present at most veins.

glabrous or pubescent;

collars usually densely pubescent, at least at the margins, sometimes glabrous;

ligules 0.2-1(1.2) mm, ciliate;

blades 30+ cm long, 3-6.5 mm wide, conduplicate or flat, ribs 7-15(17), usually more than 1/2 as deep as the blade thickness, abaxial surfaces glabrous or sparsely pubescent proximally, adaxial surfaces pubescent;

abaxial sclerenchyma forming a continuous band;

adaxial sclerenchyma present;

girders usually formed at most veins.

10-25(30) cm, open, with (1)2(4) branches per node;

branches spreading and lax.

15-25(30) cm.

8-18(20) mm, borne towards the ends of the branches, with 3-6(8) florets.

(8)13-18(20) mm, with (3)4-6(8) florets.

lanceolate, glabrous or sparsely scabrous at the apices;

lower glumes (4)4.5-6.7(8) mm;

upper glumes (5)6-10 mm;

lemmas (7)7.5-11 mm, lanceolate, scabrous, puberulent, sometimes minutely bidentate, acute, usually awned, rarely unawned, awns (1)2-3(4) mm;

paleas shorter than to longer than the lemmas, pubescent or glabrous on the margins, intercostal region usually puberulent distally;

anthers (3)4-7.5(8.5) mm;

ovary apices densely pubescent.

usually entire, sometimes minutely bidentate.

= 56.

= 56.