Flora of North America species comparison

usually simple, sometimes branched distally.

simple or branched among heads.

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.

(2–)3–4 pairs, basal and cauline (basal usually withered by flowering, petiolate or subsessile, blades ovate or nearly round to oblong-ovate, much smaller than cauline; sterile rosettes often present, proximal cauline often crowded toward stems bases); petiolate;

blades broadly to narrowly lanceolate, oblong-ovate, ovate-lanceolate, or round, 4–22 × 1–6 cm, (bases obtuse or cuneate to truncate) margins usually entire, sometimes sparsely denticulate, faces scantily to moderately pilose (hairs white), adaxial sparsely stipitate-glandular (distal cauline leaves sessile, extremely reduced, nearly linear to narrowly elliptic-lanceolate).

narrowly turbinate.

turbinate to narrowly campanulate.

8–15;

corollas yellow.

usually 0 (sometimes peripheral florets pistillate; corollas yellow, laminae rudimentary).

20–90;

corollas yellow;

anthers yellow.

20–50;

corollas yellow (1 or more lobes sometimes expanded, giving appearance of laminae);

anthers yellow.

8–20, lanceolate to oblanceolate.

8–20, linear to narrowly lanceolate.

1 or 3–5(–9).

(1–)3–9(–14; often nodding in bud).

dark brown, 5–9 mm, sparsely villous;

pappi white, bristles barbellate.

brown to black, 4–7 mm, glabrous or sparsely stipitate-glandular to densely hirsute;

pappi usually stramineous, rarely tawny, bristles barbellate to ± subplumose.

= 38, 76.

= 38, 57, 76.