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 usually 0 mm;

blades linear, 3–8(–15) × 0.2–1 mm;

margins usually entire, rarely 1–3-lobed.

1–70 mm.

1–10 mm.

campanulate to hemispheric.

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.

24–36;

corollas yellow, tubes 0.5–1 mm, throats tubular, 1–1.2, lobes 0.4–0.6 mm.

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

3–4, linear or lanceolate to oblanceolate, 5(–5) × 0.5–1.2 mm.

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

(2–6) in tight, corymbiform arrays, 4–6.5 × 3.5–5.5 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.

oblanceolate, (1.5–)2.2–2.8 mm;

margins moderately calloused, moderately to densely coarse-ciliate;

pappi usually 0, sometimes of 1–2 bristles 1–2 mm, usually plus crowns of cilialike scales, rarely callous crowns.

= 65–72 or 100–116.

= 38 ± 2.