Flora of North America species comparison

30-100 (140) cm;

internodes usually glaucous;

branches mostly erect, straight.

1.1-3.1 m;

internodes not glaucous;

branches arching.

smooth;

ligules 0.3-1.5 mm, sometimes ciliate, cilia to 0.7 mm;

blades 6-48 cm long, 0.8-5 mm wide, glabrous or densely pubescent with spreading hairs.

smooth;

ligules 0.2-0.5 mm, ciliate, cilia 0.6-1.5 mm;

blades 21-54 cm long, 2.3-6 mm wide, glabrous or sparsely pubescent, with spreading hairs.

2-31 per culm; subtending sheaths (2.6)4.1-4.5(13.5) cm long, (1.5)2.7-4.7(8) mm wide;

peduncles (1)5-31(195) mm, with 2-5 rames;

rames (1.5)2.8-4.2(6) cm, exserted or not at maturity, pubescence increasing in density distally within each internode.

12-190 per culm; subtending sheaths (2.1)2.4-3.5(4.1) cm long, (2.3)2.6-3(3.8) mm wide;

peduncles (13)20-31(43) mm, with 2(3) rames;

rames (1.2)1.5-2.1(2.6) cm, usually exserted at maturity, pubescence increasing in density distally within each internode.

spikelets (3)3.9-4.7(5.7) mm;

callus hairs 1-5 mm;

keels of lower glumes scabrous only beyond midlength;

awns 8-24 mm;

anthers 1, 0.6-1.4(1.7) mm, yellow or purple.

spikelets (4.1)4.4-4.6(5) mm;

callus hairs 1-1.5 mm;

keels of lower glumes scabrous only above the midpoint;

awns 2-11 mm;

anthers 1, 1.4-2.4 mm, red.

spikelets vestigial or absent.

spikelets vestigial or absent.

= 20.

= 20.