Flora of North America species comparison

erect or decumbent, branched proximally or distally, ± hairy.

erect, branched distally, glabrous or slightly hairy.

linear to oblanceolate or oblong, 8–210 × 1–5.5(–15) mm, (± fleshy in coastal forms) margins entire or with 3–5+ teeth, faces glabrous or ± hairy.

linear or subulate, 40–150 × 2–3+ mm, margins entire, faces glabrous.

campanulate to depressed-hemispheric or hemispheric, 5–14 mm.

hemispheric, 5–10 mm.

conic, muricate, glabrous.

± conic, papillate, glabrous or sparsely hairy.

6–16;

laminae linear to oblong, 5–18 mm.

7–15; (corollas yellow) laminae oblong, 4–14 mm.

(persistent or falling with cypselae) 4–16 (in 1–2 series), elliptic to ovate or lanceolate to oblong, hairy.

10–14, ± lanceolate (distinct tips ± deltate), glabrous but for apices.

black to gray or silver-gray, linear to narrowly clavate, to 4 mm, glabrous or hairy;

pappi 0, or of 1–7 translucent (rarely opaque), brown (rarely white), linear to subulate, aristate scales.

gray, clavate or obovoid, 2–3.5 mm, margins not ciliate, faces glabrous, or hairy and papillate (papillae rusty or yellowish, wartlike);

pappi 0.

appendages deltate to sublanceolate.

appendages deltate or broadly ovate.