Flora of North America species comparison

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

nearly always glaucous, glabrous.

single or loosely clustered.

single or clustered.

evenly distributed;

petiolate or subsessile;

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

(thickish and turgid) progressively reduced distally;

petiolate;

blades ovate or obovate to lanceolate, 4–9(–15+) × 1.5–3(–4+) cm, bases tapered, margins wavy or subentire (often with callous denticles; mid and distal leaves sessile, bractlike).

± 8;

corolla laminae ± 10 mm.

8–10;

corolla laminae 4–10 mm.

± 13, 7–10 mm, tips black (hairy).

± 13 (± 21), 6–9 mm, tips green to brownish (not blackened).

of 3–7 bractlets (0.5–3 mm).

of 1–3+ oblong to lance-linear bractlets (less than 3 mm).

(1–)3–5(–6) in cymiform arrays.

(3–)8–24+ in corymbiform arrays.

glabrous.

glabrous.

= 40.