Flora of North America species comparison

25-90 cm.

4-20(30) cm, to 18 cm in bulbiferous plants, slender.

closed for 1/2 - 3/4 their length, smooth or sparsely scabrous, margins not ciliate;

ligules 0.3-2.1 mm, smooth or sparsely scabrous, truncate to obtuse, ciliolate;

blades 0.6-3.5 mm wide, flat.

closed for 1/10 – 1/6 their length, terete;

ligules 1-4 mm, smooth;

blades 0.5-1.5(2) mm wide, flat or folded, thin, soft, apices narrowly prow-shaped.

mainly pseudointravaginal.

all or mainly intravaginal.

7.5-15(18) cm, lax, pyramidal, open, sparse;

nodes with 1-3(5) branches;

branches 3-8 cm, ascending, straight to spreading, angled, angles prominent, scabrous.

2-7 cm, 2-4 cm in bulbiferous plants, widths equal to lengths, erect, broadly rhomboidal to pyramidal, open, exserted from the sheaths, sparse;

branches 1.5-5 cm, ascending to spreading, divaricate, slender, sulcate or angled, angles sparsely to moderately scabrous;

pedicels often longer than the spikelets.

4-6.5 mm, laterally compressed;

florets 2-5;

rachilla internodes to 1 mm, smooth, glabrous.

3-5 mm, laterally compressed, rarely bulbiferous, usually strongly anthocyanic, glaucous or not;

florets 2-4, rarely bulb-forming;

rachilla internodes shorter than 1 mm, smooth to scabrous.

1/2-1/3 the length of the adjacent lemmas, distinctly keeled, keels scabrous;

lower glumes subulate to narrowly lanceolate, (1)3-veined;

upper glumes shorter than or subequal to the lowest lemmas;

calluses webbed;

lemmas (2.5)3.2-4.7 mm, lanceolate, green, distinctly keeled, keels and marginal veins long-villous, hairs extending up almost the whole keel length, lateral veins prominent, intercostal regions smooth, minutely bumpy, usually glabrous, rarely sparsely softly puberulent, apices acute, blunt, or pointed, white, not bronze;

palea keels softly puberulent at midlength, apices scabrous;

anthers (0.5)0.8-1.2(1.5) mm.

distinctly keeled;

lower glumes subequal to equaling the lowest lemmas, 3-veined, upper glumes frequently longer than the lowest lemmas;

calluses glabrous;

lemmas 2-3 mm, lanceolate, distinctly keeled, thin, keels and marginal veins crisply puberulent, rarely glabrous, intercostal regions glabrous, apices acute;

paleas scabrous over the keels;

anthers 0.2-0.7 mm.

= 28.

= 14.