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.

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.

usually narrowly turbinate, rarely narrowly campanulate.

hemispheric.

8–16, yellow.

6–16;

corollas yellow.

corollas yellow;

anthers yellow.

corollas yellow;

anthers yellow.

9–20, linear to narrowly lanceolate.

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

1–3(–5).

1–3(–5; erect).

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

pappi stramineous to tawny, bristles subplumose.

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

pappi white, bristles barbellate.

= 57, 76.