Flora of North America species comparison

solitary to densely clumped, simple or branched among heads.

(branches from rhizomes) simple.

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.

2–4 pairs (basal often persistent on sterile rosettes), mostly cauline; petiolate (at least basal) or sessile;

blades oblanceolate to spatulate, 2–7 × 0.5–2.5 cm, margins usually entire, sometimes denticulate, rarely dentate, apices usually acute, sometimes obtuse, faces sparsely puberulent, moderately pubescent distally, stipitate-glandular.

narrowly campanulate to turbinate.

turbinate-campanulate.

(5–)7–17(–20);

corollas yellow.

6–10;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

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

9–15, linear-oblong to narrowly lanceolate.

(1–)3–10(–20).

1–3(–5).

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

pappi tawny, bristles subplumose.

brown, 4–7 mm, densely hirsute (not stipitate-glandular);

pappi white, bristles barbellate.

= 38, 76.