Flora of North America species comparison

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.

petioles (narrowly, if at all, winged) 5–20(–35+) mm;

blades lanceolate to lance-linear, (20–)30–50(–80+) × (3–)6–20(–30+) mm, sometimes laciniately 1-pinnatisect with 2–4+ lobes near bases, bases cuneate, margins incised to serrate, seldom ciliate, apices acute to attenuate, faces glabrous.

(10–)20–100 mm.

10–35(–55) mm.

± hemispheric, 7–12 × 12–15 mm.

usually obconic to broadly campanulate, rarely hemispheric, (4–)6–7 × (4–)5–7 mm.

8;

laminae yellow, 10–15 mm.

usually 0, sometimes 1–3+;

laminae orange yellowish, 2–5(–10) mm.

10–30+;

corollas pale yellow, 5–6 mm.

(7–)20–70+;

corollas yellowish, 2.5–3.5 mm.

7–8+, ovate, 7–10 mm.

(4–)5–8,oblong to lance-ovate, (4–)5–8+ mm.

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

of (2–)3–5(–7) ± erect, oblanceolate or spatulate to linear, ± foliaceous bractlets or bracts (6–)10–25(–40+) mm, margins rarely ciliate, abaxial faces usually glabrous, sometimes sparsely hispidulous.

usually borne singly.

borne singly or in 2s or 3s.

(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.

outer red-brown, ± flattened, sometimes 3–4-angled, broadly cuneate, 4–5(–6) mm, inner blackish, narrowly cuneate, (5–)6–7(–8+) mm, margins glabrous or sparsely antrorsely strigillose,apices ± truncate to convex, faces ± 1-nerved, glabrous or sparsely setulose, usually smooth, sometimes ± tuberculate;

pappi 0, or of 2(–4) spreading to divergent, antrorsely or retrorsely barbed awns (0.1–)1–3.5+ mm.

= 26.

= 48.