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

± hemispheric, 10–15+ mm diam.

± hemispheric to turbinate, 8–16 mm diam.

8–13;

laminae 15–25+ mm.

0.

60–100+;

corollas yellow.

40–60(–80+);

corollas yellow.

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

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

borne singly.

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

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

pappi 0–0.5 mm.

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

pappi 0–0.3 mm.

= 34.

= 34.