Flora of North America species comparison

60-160 cm;

internodes not glaucous.

1-2 m;

internodes not glaucous.

(2)2.5-3.4(4.7) mm wide, scabrous;

ligules sometimes ciliate, cilia to 0.3 mm;

blades green, usually scabrous.

scabrous;

ligules ciliate or not, cilia to 0.3 mm;

blades green, usually pubescent.

sheaths of inflorescence units usually 2.5-3.4 mm wide;

peduncles (4)11-35(60) mm;

rames usually 2.1-2.9 cm, exerted.

sheaths of inflorescence units (2)2.4-3.1(4) mm wide;

peduncles 2-5(8) mm;

rames usually 1.7-2.8 cm, not exserted at maturity.

of lower glumes usually smooth below midlength, scabrous distally;

anthers eventually deciduous.

of lower glumes usually smooth below midlength, scabrous distally;

anthers often retained within the spikelets.