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.

all or mostly alternate (proximal sometimes opposite);

blades ± lance-ovate to lanceolate, 5–12+ × 2–5+ cm, bases ± cuneate, margins ± toothed, apices acute to attenuate, faces strigose to sericeous.

campanulate to turbinate, 3–5+ mm diam.

± hemispheric, 10–15+ mm diam.

(0–)1–3(–5);

laminae 10–15(–20+) mm.

8–13+;

laminae 20–25(–30+) mm.

8–15+;

corollas yellow.

40–80+;

corollas yellow.

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

16–21+ in 2–3 series, ± erect, lanceolate, 6–9+ mm.

20–100+ in corymbiform-paniculiform arrays.

2–5(–10+) in ± corymbiform arrays.

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

pappi 3–4 mm.

dark brown to black, oblanceolate to elliptic, 5 mm, faces strigillose to glabrate;

pappi 0.5–1.5 mm.

= 34.

= 34.