Flora of North America species comparison

1–5+, ascending to erect, glabrous or sparsely puberulent.

usually not brittle at maturity, usually proximally glabrous or glabrate and distally hairy in lines, sometimes ± uniformly hairy, sometimes glabrous distally.

thin, margins entire, apices acute, faces glabrous or sparsely puberulent;

basal persistent, petiolate, blades narrowly elliptic to obovate, 50–150 × 3–15 mm, attenuate, margins entire;

proximal cauline sessile or subpetiolate, blades linear to narrowly elliptic, 50–150 × 2–15 mm, bases attenuate or cuneate;

distal sessile, blades 30–60 × 2–10 mm, reduced distally, bases cuneate to rounded.

basal usually withering by flowering, usually petiolate, sometimes sessile or subsessile, blades 1-nerved, spatulate to oblanceolate, elliptic, or ovate to cordate, margins coarsely serrate to crenate or entire;

cauline petiolate or sessile, blades widely ovate to linear, bases cordate or subcordate, rounded, cuneate, or attenuate, sometimes auriculate and ± clasping.

sparsely hairy, bracts 0–3+.

campanulate, 5–10 mm.

15–40;

corollas violet, laminae 9–15 × 1–2 mm.

30-80(–100);

corollas yellow, sometimes becoming reddish, 4.5–6 mm, lobes triangular, 0.5–1 mm.

± ampliate, throats usually ± narrowly funnelform, sometimes cylindric or funnelform-campanulate, lobes usually erect, sometimes spreading, recurved, or reflexed.

in 3–5 series, narrowly oblong or linear (outer) to linear (inner), unequal, bases indurate, margins entire, green zones elliptic to lanceolate, apices usually acute, sometimes obtuse, faces glabrous or ± puberulent.

strongly unequal to subequal, outer sometimes ± foliaceous, green zones usually diamond-shaped to lanceolate, apices sometimes foliaceous.

in corymbiform to paniculiform arrays, branches usually few.

radiate or disciform.

brown, cylindric to obovoid, not compressed, 2.5–3.5 mm, ± 4-nerved, faces hairy;

pappi whitish, 5–7 mm.

cylindric to obovoid or oblong, sometimes ± compressed, 2–6-nerved, glabrous or ± strigillose.

(or pistillate) florets usually (6–)7–50(–60) in 1 series and laminae (3–)5–18(–21) × 0.8–2.8 mm, sometimes 14–110+ in 2–5+ series (sect. Conyzopsis) and laminae 4.5–5 × 0.1–0.2 mm or reduced to tubes.

= 7, 8.