Flora of North America species comparison

(forming clumps) simple or branched among heads.

usually simple, rarely branched.

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.

3–7 pairs, mostly cauline; petiolate (petioles, at least proximal, relatively narrow, ± equaling blades);

blades narrowly to broadly lanceolate or ovate, 3.5–14 × 0.5–3.7 cm, margins regularly dentate or denticulate, apices acute, faces glabrous or moderately pilose, sparsely to densely stipitate-glandular.

usually narrowly turbinate, rarely narrowly campanulate.

campanulate-turbinate.

8–16, yellow.

6–17;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

9–20, linear to narrowly lanceolate.

6–14, lanceolate (apices acute).

1–3(–5).

3–8 (erect).

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

pappi stramineous to tawny, bristles subplumose.

gray to brown, 3–6 mm, densely hirsute, sometimes stipitate-glandular;

pappi white, bristles barbellate.

= 57, 76.

= 38, 57, 76.