Flora of North America species comparison

(sometimes in 3s or 4s) sessile;

blades obovate or elliptic to lanceolate or linear, (20–)50–100(–160+) × (5–)10–25(–40+) mm, bases cuneate to rounded, margins usually coarsely dentate to serrate, sometimes ciliate, apices acute to acuminate, faces glabrous.

petioles 20–40 mm;

blades deltate or lanceolate to lance-linear overall, (30–)50–120(–220) × 10–50(–150) mm, sometimes either 1-pinnately lobed, primary lobes 3–5+, lanceolate to lance-linear, 30–120 × 3–25+ mm, or 2-pinnatisect, ultimate lobes linear, 5–30 × 1–2+ mm, bases truncate to cuneate, ultimate margins entire or serrate, seldom ciliate, apices obtuse to acuminate, faces glabrous or puberulent.

(10–)20–60 mm.

(10–)40–60+ mm.

turbinate to hemispheric or broader, (4–)6–8(–10+) × 8–12+ mm.

campanulate to hemispheric, 4–6 × 5–10 mm.

usually 7–8, rarely 0;

laminae orange-yellow, (10–)15–25(–30) mm.

5–6;

laminae yellow, 10–30 mm.

(25–)60–100(–150+);

corollas yellow to orange-yellow, 3–6.5 mm.

12–30(–60+);

corollas yellowish, 3–4 mm.

8–12, ovate or obovate to lance-oblong, (4–)6–8(–10+) mm (tips often orange to purplish, as are tips of paleae).

8–12, ovate to lanceolate, 4–5(–7) mm (margins usually yellow).

of 5–7(–9+) erect or spreading to reflexed, oblanceolate or lanceolate to linear, often foliaceous bractlets or bracts (6–)10–12(–20+) mm, margins usually ciliate, abaxial faces glabrous or bases hispidulous.

of 8–12(–17) usually erect, linear, seldom foliaceous bractlets 3–6 mm, margins ciliate, abaxial faces usually glabrous, sometimes hispidulous at bases.

(erect at flowering, sometimes nodding in fruit) borne singly or in open, ± corymbiform arrays.

in ± corymbiform arrays.

blackish, red-brown, or stramineous, obcompressed, flattened or unequally 3–4-angled, ± cuneate, outer 6–8 mm, inner 8–10 mm, margins retrorsely ciliate or barbed, apices ± truncate to convex, faces ± 1-nerved, ± striate, glabrous;

pappi of 2–4 ± erect, retrorsely barbed awns 3–5 mm.

dark brown to blackish, ± flattened, sometimes unequally 3–4-angled, ± linear, outer 4–6 mm, inner 5–7 mm, margins not barbed or ciliate, apices truncate, faces weakly 2-grooved, glabrous or sparsely strigillose, sometimes tuberculate;

pappi 0, or of (1–)2(–4) erect to spreading, retrorsely barbed awns (1–)1.5–4 mm.

= 22, 24.

= 24 (Mexico).