Flora of North America species comparison

1–6, ascending or erect, simple or branched proximally and distally, glaucous or glabrous.

1–5+, ± erect, branched distally, sparsely leafy, glabrous.

proximal linear to obovate, sometimes pinnately lobed, not fleshy, ultimate margins entire or dentate, faces glabrous;

distal reduced (ovate to lanceolate, rarely pinnately lobed, bases clasping).

proximal obovate, pinnately lobed (lobes 3–5+ pairs, triangular to oblong or linear), not fleshy, ultimate margins entire or dentate, faces glabrous;

distal reduced (usually with 2 lobes near bases).

hemispheric, 10–22+ × 6–22+ mm.

± campanulate, 7–10 × 3–6 mm.

densely bristly.

not bristly.

85–257;

corollas usually pale yellow, sometimes white, 8–12 mm;

outer ligules exserted 2–5 mm.

19–70;

corollas usually yellow, sometimes white, 6–7 mm;

outer ligules exserted 1–2 mm.

(25–)40–60+ in 4–6+ series, (midstripes usually reddish or purple) orbiculate to ovate, oblong, lance-oblong, or linear, unequal, hyaline margins 1–2.5 mm wide, faces glabrous.

16–20+ in 2–3 series, lanceolate to lance-linear, hyaline margins 0.05–0.1 mm wide, faces glabrous.

0.

of 5–8+, ovate to lanceolate bractlets, hyaline margins 0.05–0.2 mm.

± prismatic, 1.6–3.2 mm, ribs extending beyond apices, 5 more prominent than others;

persistent pappi of 20–25+, blunt teeth plus 2–6 bristles.

± cylindro-fusiform, 1.7–2.3 mm, ribs extending to ca. 0.1–0.2 mm short of apices (minutely hirtellous or muriculate), ± equal (distal 0.1–0.2 mm of cypselae smooth);

pappi persistent, of 8–15+, needlelike teeth plus 1(–2) bristles.

70–100% 3-porate.

70–100% 4-porate.

= 14.

= 28.