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 opposite (distal sometimes alternate);

blades ± elliptic, 3–6(–10) × 0.8–2.2(–3) cm, bases ± cuneate, margins toothed to subentire, apices ± rounded or obtuse, faces ± scabrellous.

campanulate to turbinate, 3–5+ mm diam.

± hemispheric to turbinate, 8–16 mm diam.

(0–)1–3(–5);

laminae 10–15(–20+) mm.

0.

8–15+;

corollas yellow.

40–60(–80+);

corollas yellow.

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

18–24+ in 2–3 series, ± erect, spatulate to lance-linear, 5–9+ mm.

20–100+ in corymbiform-paniculiform arrays.

borne singly or (2–)3+ in dichasial arrays.

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

pappi 3–4 mm.

purplish black, ± elliptic, 5–7 mm, faces glabrous or sparsely hirtellous;

pappi 0–0.3 mm.

= 34.

= 34.