Flora of North America species comparison

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

nodes and internodes pubescent.

20-80 cm, erect or decumbent, sometimes rooting at the lower nodes;

internodes densely pubescent to pilose;

nodes pubescent to pilose.

sometimes inflated, glabrous or pubescent;

ligules 0.5-1 mm;

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

from conspicuously inflated to not inflated, glabrous or pubescent to pilose;

ligules 0.5-1 mm;

blades 5-15 cm long, 6-20 mm wide, lanceolate, flat, straight, diverging or ascending, velvety pubescent 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.

5-15 cm long, 0.5-4 cm wide, spreading or contracted;

rachises hairy;

branches (2)3-8(10), 1-4 cm long, 0.4-0.6 mm wide, appressed or reflexed and spreading, velvety pubescent, not winged, with 10-14 spikelets, spikelets in unequally pedicellate pairs at the middle of the branches, solitary distally;

pedicels 0.5-1 mm, pilose, apices hairy or glabrous.

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

3-4.5(4.9) mm long, 1.2-1.7 mm wide, elliptic.

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.

equaling the lower lemmas, nearly glabrous or sparsely to densely pilose, elliptic, 5-7-veined, acute, unawned;

lower lemmas 2.7-4 mm long, 1.2-1.7 mm wide, elliptic, setose to pilose, 5-veined, acute, unawned;

lower paleas 1-4 mm, hyaline;

anthers absent or 3;

upper lemmas 2.3-3.3 mm, elliptic, indurate, dull, rough, occasionally with a few long hairs, acute to rounded, sometimes mucronate;

upper paleas indurate.

= 54.

= 36.