Flora of North America species comparison

petioles 10–30 mm;

blades lanceolate to lance-linear overall, 30–80(–150) × 10–30(–50) mm, usually laciniately pinnatisect, primary lobes 3–7+, 15–60+ × 2–20 mm, bases cuneate, ultimate margins laciniate to serrate, ciliate, apices acuminate, faces glabrous or sparsely scabrellous.

petioles 3–20 mm;

blades usually rounded-deltate overall, 10–30+ × 5–20+ mm, 1–2-pinnatisect, ultimate lobes linear to filiform, 2–25 × 0.5–1(–2) mm, bases obscurely cuneate, ultimate margins minutely, if at all, ciliate, apices obtuse to acute (sometimes apiculate), faces glabrous or sparsely hirtellous.

(10–)30–80+ mm.

10–50(–100) mm.

± hemispheric or broader, 6–8(–12) × 10–15 mm.

± cylindric, 3.5–5 × (1–)2–3 mm.

(5–)8–10+;

laminae yellow, 10–25 mm.

0 or 1–3+;

laminae yellowish, 1–4 mm.

(12–)20–40+;

corollas yellowish, 2–3+ mm.

5–9(–13);

corollas yellowish, 1–1.5 mm.

7–8(–13), lance-ovate to lance-linear, 6–8(–12) mm.

5–6, lance-elliptic to lanceolate, 2.5–4(–5) mm.

of 8–12(–16) usually spreading to reflexed, linear, seldom foliaceous bractlets (4–)5–7(–12) mm, margins entire, ciliate, abaxial faces glabrous or ± scabrellous.

of (1–)3(–5), appressed to spreading, linear bractlets (1–)3(–4) mm, margins minutely, if at all, ciliate, abaxial faces usually glabrous, sometimes sparsely hispidulous.

in ± corymbiform arrays.

usually borne singly.

red-brown to blackish, ± flattened (unequally 3–4-angled), broadly cuneate, outer (4–)5–6 mm, inner 5–7 mm (lengths mostly 1.5–2.5 times widths), margins (± corky-winged) patently to antrorsely barbed, apices truncate to concave, faces weakly striate, sometimes tuberculate, glabrous or sparsely strigillose;

pappi 0, or of 2(–4) spreading to divergent, antrorsely or retrorsely barbed awns (0.5–)2–4(–6) mm.

red-brown to blackish (sometimes with lighter blotches), outer ± obcompressed and linear, 3–5 mm, margins not ciliate, apices ± truncate, faces 2-grooved, usually glabrous;

inner similar, ± equally 4-angled, linear-fusiform, (6–)7–12 mm, apices ± attenuate;

pappi 0, or of 2(–3) spreading to divergent, retrorsely barbed awns 1–2 mm.