Flora of North America species comparison

square, glabrous, hispid, or scabrous.

terete, 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.

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.

17–35;

corollas yellow.

27–38;

corollas yellow.

85–150 (–200);

corollas yellow.

100–275;

corollas yellow.

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

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

8–12 × 5–9 mm;

pappi 0.5–1.5 mm.

10–18 × 6–12 mm;

pappi 1–3 mm.

= 14.