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 (0–)1–7 mm;

blades lanceolate, lance-ovate, ovate, or suborbiculate, 4–8 × 2–8 mm, margins entire, serrate, or shallow-lobed.

1–70 mm.

0–3 mm.

campanulate to hemispheric.

narrowly campanulate.

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.

11–17;

corollas white, tubes 0.8–1 mm, throats tubular to subfunnelform, 1.5–3 mm, lobes 0.8–1 mm.

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

8–10(–12), linear to broadly or narrowly lanceolate, 4.5–6 × 1–2 mm.

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

usually borne singly (often obscured by the dense leaves), 7–8(–10) × 3.5–7 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.

oblong to oblanceolate, 1.8–2.2(–2.5) mm, margins notably calloused, glabrous;

pappi of 2–3(–5) ± flattened bristles 1.5–2.3 mm.

= 65–72 or 100–116.