Flora of North America species comparison

single.

single or loosely clustered.

basal and cauline (basal and proximal sometimes withering before flowering, mid-stem leaves prominent at flowering);

petioles weakly defined;

blades oblanceolate to linear-oblanceolate or spatulate, 5–15 × 0.5–3(–5) cm, margins subentire to coarsely dentate or subpinnatifid (distal leaves bractlike).

basal and cauline (basal often withering before flowering);

petioles unwinged or weakly so, 2–5 cm;

blades ovate to broadly lanceolate, 2–5 × 1–3 cm, margins subentire to dentate or wavy (proximal cauline petioles usually winged, 0.5–1.5 cm, blades narrowly ovate to lanceolate, 2–4+ × 0.5–2 cm, margins subentire to wavy; mid and distal cauline smaller, clasping, bractlike).

± abruptly contracted to peduncles.

± abruptly contracted to peduncles.

(13–)21+;

corolla laminae 5–9+ mm (sometimes incompletely opened, appearing tubular).

(0) or 13–21;

corolla laminae to 10 mm.

30–50;

corollas yellow.

40–60;

corollas ochroleucous or white.

usually 21, green or yellowish green (tips sometimes pinkish), 4–10 mm.

mostly (13–)21, purplish (at least distally), 8–10(–12) mm.

(4–)6–20(–40+), in loose to crowded, corymbiform arrays.

1–4(–6+).

glabrous;

pappi white or dirty white.

glabrous;

pappi white.

= 48.

= ca. 46 (48?).