Flora of North America species comparison

all or mostly opposite (distal sometimes alternate);

blades ovate-deltate or rhombic to lance-elliptic, 3–5 × 1–3 cm, bases subtruncate to cuneate, margins coarsely toothed to subentire, apices obtuse to acute, faces ± hirtellous to scabrellous.

all or mostly opposite (distal sometimes alternate);

blades ± ovate to elliptic or lanceolate, 3–7+ × 0.8–2.5+ cm, bases ± cuneate, margins toothed, apices obtuse, faces scabrellous.

± hemispheric, 10–15+ mm diam.

hemispheric or broader, 12–15+ mm diam.

8–13;

laminae 15–25+ mm.

(5–)8;

laminae 12–15+ mm.

60–100+;

corollas yellow.

20–60+;

corollas yellow.

18–30+ in 3–4 series, ± erect, oblong to elliptic, 6–10+ mm.

18–20+ in 2–3 series, ± erect, narrowly oblong to lanceolate, 4–6+ mm.

borne singly.

borne singly or 3–9+ in loose, corymbiform arrays.

dark brown, ± elliptic, 10 mm, faces glabrous;

pappi 0–0.5 mm.

purplish black, narrowly obovate to ± elliptic, 5 mm, faces glabrous;

pappi 0–0.3 mm.

= 34.

= 34.