Flora of North America species comparison

to 2.5 m, but as short as 20 cm in poor soils;

internodes not glaucous.

80-150 cm;

internodes not glaucous.

usually scabrous;

ligules ciliate, cilia 0.2-0.5 mm;

blades green, smooth or pubescent.

sheaths usually smooth;

ligules ciliate, cilia 0.2-0.9 mm;

blades green, smooth or pubescent.

sheaths of inflorescence units (2)2.9-4.3(5.2) cm long, 1.5-3 mm wide;

peduncles (2)8-15(40) mm;

rames 1.3-3 cm, exerted.

sheaths of inflorescence units (2.3)2.9-4.5(6.3) cm long, (1.5)2.3-3.3(4.4) mm wide;

peduncles (2)5-10(16) mm;

rames (1.7)1.9-2.3(2.8) cm, exerted.

of lower glumes usually smooth below midlength, scabrous distally;

anthers often retained within the spikelets.

of lower glumes usually scabrous below and above the midpoint.