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.

petioles 5–10 mm;

blades 3-partite or compound-pinnatifid, 15–35 × 15–30 mm, lobes lobed, cleft, parted, or divided, ultimate margins crenate.

1–70 mm.

3–10 mm.

campanulate to hemispheric.

campanulate.

usually 8–14, rarely rudimentary or 0;

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

usually 0 (sometimes 1–2 reduced rays in isolated heads, laminae color unknown, 3–5 × 1.5–2 mm).

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.

25–45;

corollas yellow, tubes 1–1.2 mm, throats tubular to narrowly funnelform, 2–2.5 mm, lobes 0.6–0.8 mm.

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

14–20, linear to linear-lanceolate, 6–9 × 0.5–1.2(–2) mm (apices usually short-attenuate, sometimes acute).

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

in corymbiform arrays, 7–10 × 6–11 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 oblanceolate, 3–4 mm, margins thin-calloused, short-hairy;

pappi usually 0, sometimes of 1–3 moderately stout bristles 2.8–4.5 mm, often plus hyaline, laciniate scales.

= 65–72 or 100–116.

= ca. 17.