Flora of North America species comparison

all or mostly alternate (proximal sometimes opposite);

blades lance-elliptic or lanceolate to lance-linear, 10–25+ × 2–8+ cm, bases narrowly cuneate, margins coarsely toothed to subentire, apices attenuate, faces scabrellous.

all or mostly alternate (proximal sometimes opposite);

blades lance-ovate or lance-elliptic to lance-linear, 5–12(–22+) × 1–6(–12+) cm, sometimes pinnately lobed, bases ± cuneate, ultimate margins usually coarsely toothed to subentire, sometimes sinuate, apices acute, faces ± scabrellous to strigillose.

± saucerlike, 10–12+ mm diam.

± obconic to turbinate, 3–5 mm diam.

(2–)6–8+;

laminae 15–25+ mm.

(1–)2–3(–7);

laminae 3–4(–7+) mm.

40–60+;

corollas yellow.

8–12(–15);

corollas ochroleucous or white.

8–12+ in 1(–2) series, ± spreading to reflexed, spatulate or lance-linear to linear, 3–8+ mm.

8–12+ in 1–2 series, ± erect, spatulate to oblanceolate, 2.5–5(–7) mm.

(3–)8–25(–50+) in corymbiform to paniculiform arrays.

(20–)60–100+ in corymbiform to paniculiform arrays.

dark brown to black, oblanceolate to ± orbiculate, 4.5–5 mm, faces sparsely hirtellous to glabrate;

pappi 1.5–2 mm.

dark brown to blackish, oblanceolate, 3.5–5+ mm, faces ± scabrellous;

pappi 1.5–3+ mm.

= 68.

= 32, 34.