Flora of North America species comparison

10-55 cm, very slender, weak.

15-50 cm, erect or the bases decumbent.

closed for 1/4 - 3/5 their length, terete, smooth or sparsely scabrous, margins not ciliate;

ligules 0.5-2 mm, smooth or sparsely scabrous, truncate;

blades 0.8-2 mm wide, flat, thin, soft, apices narrowly prow-shaped.

closed for 1/4-1/2 their length, terete;

ligules acute;

blades flat, thin, apices broadly prow-shaped.

mostly extravaginal.

intra- and extravaginal.

3-8(12) cm, lax, open, sparse;

nodes with 1-2(3) branches;

branches (2)3-7 cm, spreading to reflexed, capillary, angled, angles scabrous.

erect, narrowly lanceoloid to ovoid, contracted, with 2-4 branches per node;

branches ascending to spreading, sparsely scabrous.

3.2-5.2 mm, laterally compressed, broadly lanceolate to ovate;

florets 2-3(5);

rachilla internodes smooth, glabrous.

3.5-6 mm, laterally compressed, with 3-4 florets.

narrowly lanceolate to lanceolate, thin, distinctly keeled, keels scabrous;

lower glumes 1-3-veined;

upper glumes shorter than or subequal to the adjacent lemmas;

calluses sparsely webbed;

lemmas 2.5-4 mm, lanceolate, green, distinctly keeled, keels and marginal veins short-villous, extending 2/3 – 4/5 the keel length, lateral veins fairly prominent, intercostal regions glabrous, apices obtuse to broadly acute, white, faintly bronze-colored or not;

palea keels scabrous;

anthers 0.2-0.8 mm.

broadly lanceolate, distinctly keeled, distinctly scabrous on the distal 1/3;

lower glumes 3-veined;

calluses shortly webbed;

lemmas 2.5-4.5 mm, broadly lanceolate, keeled, keels and marginal veins long-villous, intercostal regions sofdy puberulent;

palea keels scabrous, long-villous at midlength;

anthers 1.2-1.4 mm.

= unknown.

= unknown.