Flora of North America species comparison

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

narrowly elliptic to oblanceolate.

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.

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

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

3–10(–20).

radiate or disciform.

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.

= 16, 32, 48, 64.