Flora of North America species comparison

(forming clumps) simple or branched among heads.

mostly simple or distally 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, sometimes crowded at stem bases (basal leaves often persistent on sterile rosettes); petiolate (petioles narrow, 1.5–8 cm, often broadly winged on distal reduced leaves);

blades usually ovate to broadly lanceolate, seldom subcordate, 2–12 × 1–7 cm, margins usually serrate to coarsely dentate or crenate, rarely subentire, faces glabrate to pilose, stipitate-glandular.

usually narrowly turbinate, rarely narrowly campanulate.

turbinate-campanulate.

8–16, yellow.

usually 0 (corollas of peripheral florets rarely dilated, resembling rays).

corollas yellow;

anthers yellow.

20–50;

corollas yellow;

anthers yellow.

9–20, linear to narrowly lanceolate.

8–15, ovate-lanceolate to narrowly lanceolate.

1–3(–5).

3–10(–30; erect).

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

pappi stramineous to tawny, bristles subplumose.

dark gray, 6–8 mm, hirsute (hairs duplex) and stipitate-glandular;

pappi white, bristles usually barbellate, sometimes subplumose.

= 57, 76.

= 38, 57, 76.