Flora of North America species comparison

petioles 5–40 mm;

blades rounded-deltate to ovate overall, 20–50+ × 15–35+ mm, (1–)2–3-pinnatisect, ultimate lobes ± linear, (2–)5–15+ × (0.5–)2–3+ mm, bases ± cuneate, ultimate margins entire, sometimes ciliolate, apices acute to attenuate, faces usually glabrous, sometimes hispidulous.

20–30(–80) mm.

campanulate to hemispheric or broader, (5–)6–7 × 4–8 mm.

0 or 3–6;

laminae yellow, 4–6 mm.

(5–)12–20(–45);

corollas yellow, 2–3 mm.

8, lance-linear, 5–7 mm.

of 6–12 ± appressed, linear bractlets 5–7 mm, margins scabro-ciliate, abaxial faces usually pilosulous to hirsutulous, rarely glabrous.

usually borne singly, sometimes in 2s or 3s.

outer red-brown, flat or weakly 4-angled, linear, 6–8 mm, margins not ciliate, apices somewhat attenuate, faces obscurely 2-grooved, often tuberculate, glabrous or ± strigillose;

inner similar, blackish (sometimes with pale tips), ± equally 4-angled, linear-fusiform, 8–15 mm, margins not ciliate, apices attenuate, faces 2-grooved, glabrous or, toward tips, strigillose;

pappi of 2(–3), spreading to divergent, retrorsely barbed awns (1–)1.5–3 mm.