Flora of North America species comparison

terete, hirsute, hispid, or scabrous.

square, glabrous, hispid, or scabrous.

basal persistent, petiolate or sessile;

cauline petiolate or sessile;

blades lanceolate, linear, ovate, or rhombic, 4–60 × 1–30 cm, usually (proximal) 1–2-pinnately lobed, bases attenuate to truncate, ultimate margins unevenly toothed or entire, apices acute, faces hirsute, hispid, or scabrous.

basal caducous;

cauline usually opposite, rarely whorled (in 3s), petiolate or sessile;

blades deltate, lanceolate, or ovate, 2–41 × 0.5–24 cm, bases attenuate or truncate (distal connate-perfoliate), margins entire, dentate, or bidentate, apices acuminate to acute, faces scabrous to hispid.

27–38;

corollas yellow.

17–35;

corollas yellow.

100–275;

corollas yellow.

85–150 (–200);

corollas yellow.

25–45 in 2–3 series, outer reflexed or appressed, apices acuminate to caudate, abaxial faces hispid to scabrous, ± stipitate-glandular.

25–37 in 2–3 series, outer appressed, apices acute to acuminate, abaxial faces scabrous or hispid.

10–18 × 6–12 mm;

pappi 1–3 mm.

8–12 × 5–9 mm;

pappi 0.5–1.5 mm.

= 14.