Flora of North America species comparison

all or mostly opposite (distal sometimes alternate);

blades ± elliptic, 3–6(–10) × 1.2–2.8(–3.5) cm, bases rounded, margins toothed, apices ± rounded to acute, faces hirsutulous to hispido-scabrellous or 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.

± hemispheric, 8–10 mm diam.

± hemispheric, 10–15+ mm diam.

(5–)11–13;

laminae (15–)25–30+ mm.

8–13+;

laminae 20–25(–30+) mm.

40–60(–80+);

corollas yellow.

40–80+;

corollas yellow.

16–24+ in 2–3 series, ± erect, linear, 2–3+ mm.

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

(3–)12–25+ in ± paniculiform arrays.

2–5(–10+) in ± corymbiform arrays.

purplish black, ± obovate, 4–5 mm, faces glabrous;

pappi 0.5–1 mm.

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

pappi 0.5–1.5 mm.

= 34.

= 34.