Flora of North America species comparison

30-100 cm.

10-170 cm.

1.5-5 cm long, 1.5-2 cm wide, ovoid to oblong-ovoid, continuous, not lobed, truncate at the base;

branches not evident, spikelets borne singly, not clustered.

2-20 cm long, 0.6-1.5 cm wide, cylindrical, discontinuous, sometimes lobed;

branches sometimes evident, spikelets borne singly, not clustered.

homogamous, with 3 florets, terminal floret bisexual;

disarticulation above the glumes, beneath the sterile florets.

homogamous, with 3 florets, terminal floret bisexual;

disarticulation above the glumes, beneath the sterile florets.

7-10 mm long, 2-2.5 mm wide, smooth, mostly glabrous, sometimes sparsely pilose between the veins, keels winged, wings to 0.6 mm, widening distally, lateral veins inconspicuous, smooth, apices rounded to acute, sometimes mucronate;

sterile florets 2, equal or subequal, 2-4.5 mm, 1/3 or more the length of the bisexual florets, lanceolate, sparsely hairy, acute;

bisexual florets 4.5-6.8 mm, ovate, densely hairy, shiny, stramineous to gray-brown;

anthers 2-4 mm.

2-6 mm long, 0.6-1.1 mm wide, rectangular, often purplish, keels winged, scabrous, wings about 0.4 mm wide, smooth, lateral veins conspicuous, scabrous, apices mucronate;

sterile florets 2, equal, 0.5-1.5 mm, linear, sparsely and inconspicuously hairy;

bisexual florets 2-3.8 mm long, 0.9-1.5 mm wide, laterally compressed, hairy, particularly distally, shiny, apices tapering;

anthers 0.5-1.3 mm.

3-6 mm, rounded to obtuse, lacerate;

blades 3-25 cm long, 2-10 mm wide.

4-7 mm, truncate to rounded or obtuse, lacerate;

blades 3-15 cm long, 2-12 mm wide.

= 12.

= 14.