Flora of North America species comparison

sparsely and unevenly tomentose, glabrescent except in leaf axils and among heads.

glabrous.

(often purplish-tinged) usually single, sometimes loosely clustered.

1–(2–4).

± evenly distributed (basal often withering before flowering); petiolate (sometimes obscurely);

blades ovate to broadly ovate (usually 1–3-pinnate, lobes mostly obovate to spatulate), (4–)7–20(–30) × (1–)2–5(–12) cm, bases usually tapered, ultimate margins dentate (distal leaves similar, smaller).

(thickish-turgid) progressively reduced distally; petiolate;

blades broadly lanceolate to subelliptic, 2.5–15 × 1–5 cm, bases tapered, margins sharply dentate to subentire (some teeth callous; mid leaves sometimes larger than proximal; distal leaves sessile, smaller, often clasping).

± 13;

corolla laminae 8–12 mm.

± 8 or ± 13;

corolla laminae 5–12 mm.

± 13, 3–4(–5) mm, tips black or greenish.

(± 8) ± 13 or ± 21, 5–9 mm, tips black (villous).

of 2–6 (inconspicuous) bractlets (less than 2 mm).

of (1–)3–6 linear to filiform bractlets (lengths to 1/3 phyllaries).

(10–)20–60+ in corymbiform arrays.

(1–)4–12 in corymbiform arrays.

all sparsely hairy or ray cypselae glabrous.

glabrous.

= 40.

= 40.