Flora of North America species comparison

sessile or petioles 5–25 mm (± winged);

blades oblanceolate to linear, 15–40(–100+) × (3–)6–10(–15+) mm, bases cuneate, margins entire or ± serrate, sometimes ciliate, apices rounded or obtuse to attenuate, 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.

10–60 mm.

(10–)20–100 mm.

usually ± campanulate to cylindric, sometimes ± hemispheric, 5–7(–9) × (4–)7–10 mm.

± hemispheric, 7–12 × 12–15 mm.

0 or 3–7;

laminae pale yellow, 4–12 mm.

8;

laminae yellow, 10–15 mm.

15–30(–60);

corollas yellow (often orange-tipped), 3–4 mm.

10–30+;

corollas pale yellow, 5–6 mm.

6–8(–12), oblong, 6–11 mm (tips usually yellow, as are tips of paleae).

7–8+, ovate, 7–10 mm.

of 2–3(–9) erect, oblanceolate to lance-linear (± foliaceous) bractlets or bracts (6–)10–20(–75+) mm, margins usually ciliolate, abaxial faces glabrous.

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

borne singly or in 2s or 3s.

usually borne singly.

blackish to olive, flattened, narrowly cuneate, outer 4–9 mm, inner 5–10 mm, margins retrorsely barbed, apices ± truncate to convex, faces ± 1-nerved, ± striate, glabrous;

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

= 26.