Flora of North America species comparison

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

nodes and internodes pubescent.

100-200 cm, decumbent, rooting at the lower nodes;

internodes glabrous;

nodes 4-10, densely pilose.

sometimes inflated, glabrous or pubescent;

ligules 0.5-1 mm;

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

chartaceous to cartilaginous, lower sheaths with papillose-based hairs, upper sheaths glabrous;

collars hairy;

ligules 0.6-1.2 mm;

blades 6-28 cm long, 6-18 mm wide, linear, flat, straight, ascending or drooping, glabrous adaxially.

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.

8-20 cm long, 41-90 mm wide, open;

rachises sparsely pilose to hirsute;

branches (5)10-15(18), 2-6 cm long, 0.4-0.6 mm wide, pubescent to setose, not winged, spikelets in unequally pedicellate pairs;

pedicels 0.5-1 mm, pubescent, apices glabrous.

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

3.2-3.9 mm long, 1.1-1.3 mm wide, lanceolate to ovate.

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.

present as a membranous extension of the calluses;

upper glumes equaling the lower lemmas, hairy, lanceolate to ovate, 5-veined, acute, unawned;

lower lemmas 3-3.5 mm long, 1.1-1.3 mm wide, lanceolate to ovate, glabrous or sparsely pubescent, 5-veined, acute, unawned;

lower paleas fully developed or absent;

anthers absent or 3;

upper lemmas 2.2-2.6 mm, indurate, elliptic, rounded, mucronate, mucros less than 0.2 mm;

upper paleas 2-2.5 mm, indurate.

= 54.

= 36.