Flora of North America species comparison

single.

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 leaves often withering before flowering);

petioles weakly winged or unwinged, 2–4 cm;

blades ovate, 1.5–3 × 1–2 cm, margins subentire or wavy-denticulate, weakly revolute (proximal similar, petioles winged, usually 1–3 cm; mid and distal leaves 2–5, sessile, bractlike).

± abruptly contracted to peduncles.

tapering to peduncles.

(13–)21+;

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

usually (8) 13 or 21;

corolla laminae usually 9–15 mm, rarely 0 or to 2–3 mm.

30–50;

corollas yellow.

30–50+;

corollas yellow.

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

usually 13 or 21, greenish (tips greenish), 7–10 mm.

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

1(–2).

glabrous;

pappi white or dirty white.

glabrous;

pappi white, whitish, or brownish.

= 48.

= 48, 96.