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 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–)20–60 mm.

10–50(–100) mm.

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

± cylindric, 3.5–5 × (1–)2–3 mm.

usually 7–8, rarely 0;

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

0 or 1–3+;

laminae yellowish, 1–4 mm.

(25–)60–100(–150+);

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

5–9(–13);

corollas yellowish, 1–1.5 mm.

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

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

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 (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.

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

usually borne singly.

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.

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.

= 22, 24.