Flora of North America species comparison

all or mostly opposite (distal sometimes alternate);

blades ± ovate or lance-deltate to lanceolate, 6–12(–16+) × 3–6(–10+) cm, bases ± cuneate, margins coarsely toothed to subentire, apices usually acute to attenuate, sometimes rounded, faces scabrellous.

campanulate to turbinate, 3–5+ mm diam.

(0–)1–3(–5);

laminae 10–15(–20+) mm.

8–15+;

corollas yellow.

8–12+ in 2 series, ± erect, spatulate to oblanceolate, 3–7+ mm.

20–100+ in corymbiform-paniculiform arrays.

dark brown to black, oblanceolate, 5 mm, faces strigose;

pappi 3–4 mm.

= 34.