Flora of North America species comparison

30-100 cm, erect or decumbent, sometimes rooting at the lower nodes;

nodes and internodes pubescent.

20-100 cm, erect or decumbent, sometimes rooting at the lower nodes;

internodes pilose or pubescent;

nodes pubescent to puberulent.

sometimes inflated, glabrous or pubescent;

ligules 0.5-1 mm;

blades 10-20 cm long, 5-12 mm wide, flat, adaxial surfaces hairy.

sparsely to densely pubescent;

ligules 0.4-1.1 mm;

blades 6-12(22) cm long, 2-8 mm wide, linear, flat to conduplicate, straight, appressed to divergent, both surfaces sparsely to densely pubescent with short, evenly spaced hairs.

3-16 cm long, 1-3 cm wide;

rachises villous;

branches 2-8, 20-70 mm long, 0.8-1.1 mm wide, velutinous, sometimes winged, with 11-24 solitary spikelets (occasionally paired proximally);

pedicels 0.5-1 mm, densely villous below, often with long hairs intermixed with the short hairs, apices with more than 12 hairs of 1.5-2.5 mm.

6-20 cm long, 0.3-1.2 cm wide;

rachises pilose, longer hairs 0.1-0.8 mm;

branches 10-20(28), 15-45(60) mm long, 0.2-0.4 mm wide, appressed, pubescent to setose, not winged, with 8-16 mostly solitary spikelets, occasionally paired at the base of the branches;

pedicels 0.2-1 mm, variously hirsute below, apices with fewer than 10 hairs more than 0.5 mm long.

3.9-5.2 mm long, 2-2.5 mm wide, ovate to elliptic.

(3.1)3.5-4.5(5) mm long, 1.2-1.7 mm wide, lanceolate.

occasionally present as a scale;

upper glumes equaling the lower lemmas, ovate to elliptic, glabrous or pubescent, 7-veined;

lower lemmas 3.4-5 mm long, 2-2.5 mm wide, 5-veined, acute to apiculate, unawned;

lower paleas absent;

anthers absent;

upper lemmas 3.5-5 mm, ovate to elliptic, acute to apiculate.

as long as the lower lemmas, with sparsely appressed pubescence on the lower 2/3, scabrous or glabrous distally, 3-9-veined, acuminate and awned, awns 0.4-1 mm;

lower florets sterile;

lower lemmas 3-4.3 mm long, 1.2-1.7 mm wide, lanceolate, setose, 3-7-veined, acuminate, unawned or mucronate;

lower paleas absent;

upper lemmas 2-2.5 mm, indurate, elliptic, 5-7-veined, acute to rounded and awned, awns 0.4-1.1 mm;

upper paleas indurate, faintly rugose, blunt.

= 54.

= 36.