Flora of North America species comparison

solitary to densely clumped, simple or branched among heads.

usually simple, rarely branched.

4–8(–10) pairs, mostly cauline; usually sessile (sometimes with partly connate-sheathing bases), sometimes petiolate (proximalmost);

blades lance-elliptic, lanceolate, oblanceolate, obovate, or ovate, 4–12(–20) × (1–)2–6(–8) cm, margins subentire to dentate-serrate, apices usually acute, rarely obtuse, faces glabrate to pilose.

1–5 pairs, mostly cauline; petiolate (petioles broadly to narrowly winged, shorter than blades);

blades broadly lanceolate to linear, 2–20 × 0.3–4 cm, margins entire or irregularly denticulate or dentate, apices acute or acuminate, faces glabrous or densely woolly-villous and stipitate-glandular.

narrowly campanulate to turbinate.

hemispheric.

(5–)7–17(–20);

corollas yellow.

6–16;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

8–15(–19), narrowly to broadly lanceolate.

9–22, usually narrowly to broadly lanceolate, sometimes oblanceolate.

(1–)3–10(–20).

1–3(–5; erect).

brown, 4–8 mm, sparsely hirsutulous, stipitate-glandular;

pappi tawny, bristles subplumose.

brown, 3–8 mm, densely hirsute, rarely glandular;

pappi white, bristles barbellate.