Flora of North America species comparison

glabrous.

glabrous or with scattered hairs near leaf bases and among heads.

1–(2–4).

single or loosely clustered.

(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).

evenly distributed; petiolate or subsessile;

blades lanceolate, 4–10 × 2–4 cm, bases ± tapered, margins denticulate (distal leaves sessile, smaller).

± 8 or ± 13;

corolla laminae 5–12 mm.

± 8;

corolla laminae ± 10 mm.

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

± 13, 7–10 mm, tips black (hairy).

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

of 3–7 bractlets (0.5–3 mm).

(1–)4–12 in corymbiform arrays.

(1–)3–5(–6) in cymiform arrays.

glabrous.

glabrous.

= 40.