Flora of North America species comparison

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

(30)40-90(140) cm, scabrous near the inflorescence;

nodes usually not exposed.

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.

closed for less than 1/3 their length, glabrous or scabrous, persistent;

collars glabrous;

ligules 0.1-0.5 mm;

blades 0.8-2 mm in diameter, usually conduplicate, rarely convolute, gray-green, deciduous, abaxial surfaces scabrous, adaxial surfaces scabrous or puberulent, veins (8)11-15(17), ribs (6)7-11;

abaxial sclerenchyma usually forming a more or less continuous band;

adaxial sclerenchyma developed;

girders at the 5-7 major veins;

pillars at some of the other veins.

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

branches spreading and lax.

(5)9-18(25) cm, open or loosely contracted, with (1)2(3) branches per node;

branches erect to stiffly spreading.

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

8-13(16) mm, with (3)4-5(7) 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.

exceeded by the distal florets;

lower glumes 4.5-7.5(8.5) mm, shorter than or about equaling the adjacent lemmas;

upper glumes 5.3-8.2(9) mm;

lemmas (6.2)7-8.5(10) mm, chartaceous to somewhat coriaceous, scabrous, backs rounded below the middle, veins more or less obscure, apices mucronate or shortly awned, awns to 1.5 mm;

paleas somewhat shorter than the lemmas, intercostal region puberulent distally;

anthers (3.3) 4.5-6 mm;

ovary apices pubescent.

= 56.

= 56.