Flora of North America species comparison

10-150 cm, slender, wiry, erect at first, ultimately decumbent, sprawling, glabrous, often with purple dots and streaks, branching extensively at the base, rooting at the lower nodes.

50-200 cm, strongly compressed, decumbent-erect, glaucous;

nodes glabrous.

often shorter than the internodes, loose, glabrous, margins short-ciliate;

ligules 0.2-0.5 mm, membranous, erose, ciliate;

blades 5-20 cm long, 3-10 mm wide, thin, flat, glabrous on both surfaces, margins scabridulous, apices long-acuminate.

keeled, glabrous or pubescent near the throat, upper sheaths much shorter than the internodes;

ligules 0.5-2 mm, membranous, dissected ciliate;

blades 20-35 cm long, 7-17 mm wide, flat, glabrous on both surfaces or the adaxial surfaces sparsely pilose.

5-30 cm, nearly as wide as long;

branches few, capillary, with a few spikelets distally;

pedicels 0.5-10 mm.

12-50 cm, about 2/3 as wide, open;

primary branches spreading, often verticillate at the lower nodes;

pedicels 0.2-4 mm, scabrous, spreading.

1.7-2.2 mm long, about 1 mm wide, ellipsoid or obovoid, glabrous, faintly veined, subacute or obtuse at the apices.

2.5-3.4 mm long, about 1.2 mm wide, ellipsoid, glabrous.

0.3-0.8 mm, reduced, acute;

upper glumes and lower lemmas subequal or the glumes shorter, distinctly verrucose, with hemispheric warts;

upper florets 1.6-2 mm long, about 1 mm wide, grayish-brown, dull, minutely papillose, acute.

usually shorter than 1.7 mm, up to 1/2 as long as the spikelets, 3-veined, subacute;

upper glumes and lower lemmas subequal, scarcely longer than the upper florets, 5-veined;

lower florets sterile or staminate;

upper florets 2.9-3 mm long, about 1 mm wide, ellipsoid, glabrous, dull, pale, obscurely transversely rugose, apices minutely pubescent.

= 36.

= unknown.