Flora of North America species comparison

50-100(150) cm;

internodes green, sometimes somewhat glaucous just below the node;

branches mostly erect, straight.

50-120 cm;

internodes not glaucous;

branches mostly erect, straight.

not scabrous;

ligules 0.2-0.6 mm, ciliate, cilia 0.3-0.6 mm;

blades 11-50 cm long, 2-5.5 mm wide, sparsely to densely pubescent, most hairs appressed.

smooth;

ligules 0.2-0.5 mm, ciliate, cilia 0.2-0.8 mm;

blades 10-22 cm long, 1.2-2.6 mm wide, glabrous or sparsely pubescent, with spreading hairs.

7-97 (usually about 45) per culm; subtending sheaths (2.5)3-4.5(6) cm long, (2.5)3.2-4.1(5.5) mm wide;

peduncles (1)3-4(13) mm, with 2(3) rames;

rames (1.3)1.8-2.6(4) cm, not exserted at maturity, pubescence increasing in density distally within each internode.

3-11 per culm; subtending sheaths (2.8)4.1-5.8(7.2) cm long, (3)4-4.7(5.8) mm wide;

peduncles (9)14-31(65) mm, with 2 rames;

rames (1.5)2.4-3.6(4.2) cm, usually exserted at maturity, pubescence increasing in density distally within each internode.

spikelets (3.5)4.1-4.5(5) mm;

callus hairs 1.5-5 mm;

keels of lower glumes scabrous only above the midpoint;

awns 10-21 mm;

anthers 1, 0.9-1.6 mm, yellow.

spikelets (4)4.8-5(5.5) mm;

callus hairs 1.5-3.5 mm;

keels of lower glumes scabrous only above the midpoint;

awns 11-23 mm;

anthers 1, 1.2-2 mm, yellow.

spikelets vestigial or absent.

spikelets vestigial or absent.

= 20.

= 20.