Flora of North America species comparison

petioles 2–8(–12) mm;

blades pedately 3-lobed (lobes spatulate or linear), or 2–3-pinnatifid (lobes linear-filiform), 4–30 × 4–20 mm, ultimate margins entire.

petioles 5–30 mm (usually equal to or longer than blades);

blades deltate-orbiculate, ovate, or subdeltate, 5–27 × 6–27 mm, irregularly lobed, lobes 3–5, ultimate margins serrate or lobed.

7–15 mm.

5–10 mm.

campanulate.

broadly campanulate to hemispheric.

8–12;

corollas white, laminae broadly oblong or oblong-elliptic to subspatulate, 3–7 × 2–3 mm.

0.

30–40;

corollas yellow, often purple tinged, tubes 0.8–1 mm, throats tubular, tubular-funnelform, or tubular-campanulate, 1–1.3 mm, lobes 0.3–0.4 mm.

30–45(–60);

corollas yellow, tubes 0.8–1 mm, throats funnelform to narrowly campanulate, 1.8–2 mm, lobes 0.6–0.8 mm.

2–16, linear-lanceolate to narrow-ovate, 3.5–5 × 0.5–1.5 mm.

12–22, lanceolate to ovate, 4.5–6.5 × 1–2.5 mm.

(2–5) in corymbiform arrays, 5–6.5 × 5–6 mm.

usually borne singly, 8–10 × ca. 10 mm.

linear-oblong to narrowly oblanceolate, 1.8–2.5 mm, margins usually prominently calloused, sometimes thin, usually ciliate;

pappi of 2(–3+) barbellulate bristles 1.5–2.5 mm plus crowns of hyaline, laciniate scales.

oblong to narrowly oblanceolate, 2.5–3 mm, margins thin-calloused, sparsely short-ciliate;

pappi usually of 1(–2) unequal, distally subplumose bristles 2–2.5 mm, sometimes 0.

= 34.

= 34.