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.

sessile; submersed blades multifid (2–3+-pinnatisect), ultimate lobes filiform, mostly 0.1–0.3 mm diam.;

aerial blades ovate to lanceolate, 10–45+ × 5–20+ mm, bases cuneate, margins pectinately incised to serrate or entire, not ciliate, apices obtuse to acuminate or attenuate, faces glabrous.

(10–)20–60 mm.

(10–)20–100 mm.

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

± hemispheric, 7–12 × 12–15 mm.

usually 7–8, rarely 0;

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

8;

laminae yellow, 10–15 mm.

(25–)60–100(–150+);

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

10–30+;

corollas pale yellow, 5–6 mm.

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

7–8+, ovate, 7–10 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 5–6 usually spreading, oblong to obovate bractlets 5–8 mm, margins entire, not ciliate, abaxial faces usually glabrous.

(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.

(outer and inner ± alike) yellowish to greenish brown, nearly terete or weakly 4-angled, ± linear, 10–15 mm, margins not barbed or ciliate, apices truncate, faces smooth or ± striate, glabrous;

pappi of 2(–6) divergent to patent, retrorsely barbed (on distal 1/4 or so) awns 13–25(–40) mm.

= 22, 24.

= 26.