Flora of North America species comparison

simple or branched among heads.

usually simple, rarely branched.

(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).

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.

turbinate to narrowly campanulate.

campanulate-turbinate.

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

6–17;

corollas yellow.

20–50;

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

anthers yellow.

corollas yellow;

anthers yellow.

8–20, linear to narrowly lanceolate.

6–14, lanceolate (apices acute).

(1–)3–9(–14; often nodding in bud).

3–8 (erect).

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

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

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

pappi white, bristles barbellate.

= 38, 57, 76.

= 38, 57, 76.