Flora of North America species comparison

15-60 cm, erect or spreading, bases bulbous.

2-60 cm, terete, bases bulbous.

closed for about 1/4 their length, terete, lowest sheaths with swollen bases;

ligules 1-3 mm, smooth or scabrous, apices obtuse to acute;

blades 1-2.5 mm wide, flat, thin, lax, soon withering.

closed for about 1/4 their length, lowest sheaths with swollen bases;

ligules 1-6 mm, smooth or scabrous, obtuse to acute;

blades (0.5)1-2.5 mm wide, flat, thin, lax, soon withering.

intravaginal.

intravaginal.

3-12 cm, ovoid;

nodes with 2-5 branches;

branches ascending to spreading, terete, usually smooth or sparsely scabrous, infrequently moderately scabrous.

(0.8)2-10 cm, ovoid, loosely contracted;

nodes with 2-5 branches;

branches usually ascending, infrequently spreading, terete, usually smooth or sparsely scabrous, rarely moderately scabrous.

3-5 mm, laterally compressed, usually bulbiferous;

florets 3-7, the basal floret, and sometimes additional florets, normal;

rachilla internodes smooth, glabrous.

3-7 mm, laterally compressed, some or all bulbiferous;

florets (2)3-7, forming a bulblet, sometimes the basal 1-2 florets normal.

keeled, keels scabrous;

lower glumes 3-veined;

upper glumes shorter than or subequal to the lowest lemmas;

calluses webbed or glabrous;

lemmas 3-4 mm, lanceolate, keeled, glabrous or the keels and marginal veins short- to long-villous, intercostal regions glabrous or softly puberulent, apices acute;

paleas scabrous, keels often softly puberulent at midlength;

anthers 1.2-1.5 mm and functional, sometimes aborted late in development, sometimes not developed.

shorter than the adjacent lemmas, distinctly keeled, keels scabrous;

lower glumes 3-veined;

calluses terete or slightly laterally compressed, glabrous or dorsally webbed, hairs wrinkled;

lemmas normal or leaflike, normal lemmas 2-4 mm, distinctly keeled, glabrous throughout or the keels and marginal veins villous, intercostal regions glabrous or puberulent, leaflike lemmas thickened at the base, bladelike distally;

paleas scabrous, keels often softly puberulent at midlength;

anthers 3, (0.6)1.2-2 mm, sometimes aborted late in development, sometimes not developed.

= 14, 21, 28, 39, 42, 45.