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 tall, 2-3(5) mm thick, with cormlike bases, slightly compressed, erect or geniculate at the lower nodes;

nodes glabrous or pilose;

internodes slightly compressed, 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.

longer or shorter than the internodes, keeled, glabrous or pilose, hairs papillose-based near the throat;

ligules 0.5-2 mm, membranous, dissected ciliate;

blades (6)20-65 cm long, 2-15 mm wide, flat, adaxial surfaces glabrous or densely pubescent, particularly basally, occasionally pubescent on both surfaces, hairs papillose-based, bases subcordate to rounded.

5-30 cm, nearly as wide as long;

branches few, capillary, with a few spikelets distally;

pedicels 0.5-10 mm.

9-50 cm long, 1.5-12 cm wide, open;

branches opposite and alternate, straight or flexible, strongly ascending to reflexed;

pedicels 0.5-5 mm, scabridulous, divergent.

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

2.8-4.2(5.4) mm long, 1-2 mm wide, ellipsoid or lanceoloid, often purplish, glabrous, acute or obtuse.

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.

1.2-3.5 mm, 1/2 - 4/5 as long as the spikelets, 3-5-veined;

upper glumes often longer than the lower lemmas, glabrous, 5-7-veined;

lower florets sterile or staminate;

lower lemmas glabrous;

lower paleas 3-4 mm, sometimes longer than the lower lemmas;

upper florets 3-4 mm long, 1-1.5 mm wide, equaling or surpassing the lower lemmas, dull, pale, finely transversely rugose, lemma apices puberulent.

= 36.

= 36, 54, 70, 72.