Flora of North America species comparison

usually simple, sometimes branched distally.

mostly simple or distally branched.

2–4(–6) pairs, cauline (basal leaves often persistent on sterile rosettes), petiolate (proximal, petioles relatively short, broadly winged) or sessile (mid and distal);

blades lance-elliptic to ovate, 2–10 × 1–6 cm, margins serrate to dentate, apices obtuse to acute, faces glabrous or sparsely villous.

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.

narrowly turbinate.

turbinate-campanulate.

8–15;

corollas yellow.

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

20–90;

corollas yellow;

anthers yellow.

20–50;

corollas yellow;

anthers yellow.

8–20, lanceolate to oblanceolate.

8–15, ovate-lanceolate to narrowly lanceolate.

1 or 3–5(–9).

3–10(–30; erect).

dark brown, 5–9 mm, sparsely villous;

pappi white, bristles barbellate.

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

pappi white, bristles usually barbellate, sometimes subplumose.

= 38, 76.

= 38, 57, 76.