Flora of North America species comparison

usually simple, sometimes branched.

(forming clumps) simple or branched among heads.

2–4(–6) pairs, mostly cauline (basal often persistent on sterile rosettes); petiolate;

blades cordate or subcordate to ovate, 3–10 × 2–10 cm, margins dentate to coarsely dentate, apices acute to rounded, faces puberulent to sparsely villous, sometimes stipitate-glandular (especially adaxial).

2–3(–4) pairs (basal 1–2 pairs usually withered by flowering, petiolate, petioles broadly winged, blades round-ovate, relatively small; sterile rosettes lacking), mostly cauline; petiolate (at least middle pair, petioles broadly to narrowly winged);

blades broadly deltate to ovate, 4–8 × 2–6 cm (middle pair largest), margins irregularly denticulate to coarsely dentate-serrate, apices acute, faces puberulent (hairs minute) and stipitate-glandular.

broadly campanulate.

usually narrowly turbinate, rarely narrowly campanulate.

6–13;

corollas yellow.

8–16, yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

10–20, narrowly ovate to lanceolate.

9–20, linear to narrowly lanceolate.

1, or 3–5(–10).

1–3(–5).

dark gray, 5–10 mm, sparsely to densely hirsute (hairs duplex), sometimes stipitate-glandular as well;

pappi white, bristles barbellate.

brown to black, 5–7 mm, sparsely to moderately pilose and stipitate-glandular;

pappi stramineous to tawny, bristles subplumose.

= 38, 57, 76, 95, 114.

= 57, 76.