Flora of North America species comparison

petioles 3–45 mm;

blades ovate, cordate, suborbiculate, or triangular, 17–60 × 10–50 mm, margins deeply toothed, lobed, cleft, or divided, lobes indented to irregularly dissected.

(proximally opposite, distally alternate): petioles 3–10 mm;

blades deltate, ovate, or suborbiculate, 5–15 × 5–15 mm, margins shallow-crenate to dentate.

1–70 mm.

5–15 mm.

campanulate to hemispheric.

campanulate to hemispheric.

usually 8–14, rarely rudimentary or 0;

corollas white, laminae oblong, 1–4(–6) × 1–3 mm.

0.

40–100+;

corollas yellow, tubes 0.7–1.3 mm, throats tubular to tubular-funnelform, 0.8–1.3 mm, lobes 0.1–0.2 mm.

20–45;

corollas yellow, tubes 1–1.2 mm, throats tubular to narrowly funnelform, 1.3–1.6 mm, lobes 0.4–0.6 mm.

10–20, lanceolate or oblanceolate to ovate-lanceolate, 4–6 × 1–2 mm.

15–20, oblanceolate to broadly lanceolate, 4–5 × 0.8–1.8 mm.

borne singly or in corymbiform arrays, 4–10 × 4–10 mm.

borne singly or (2–10) in loose, corymbiform arrays, 7–9 × 6–9 mm.

suboblong, oblanceolate, or subcuneate, (1.5–)2–3 mm, margins thin (not calloused), long- or short-ciliate;

pappi 0 or of 1 antrorsely to retrorsely barbellate bristles 1–3 mm plus crowns of hyaline, laciniate scales.

narrowly suboblong to oblanceolate, 2.5–3.5 mm, margins prominently calloused, short-hairy;

pappi of 1(–2) stout bristles 1.8–2.8 mm.

= 65–72 or 100–116.

= 34.