Flora of North America species comparison

square, glabrous, hispid, or scabrous.

terete, glabrous.

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;

cauline alternate, petiolate or sessile;

blades cordate, deltate, lanceolate, ovate, or sagittate, 3–40 × 1–40 cm, sometimes (proximal) pinnately lobed, bases attenuate, cordate, hastate, round, or truncate, ultimate margins coarsely toothed or entire, apices acuminate, acute, or obtuse, faces glabrous or scabrous.

17–35;

corollas yellow.

17–29;

corollas yellow.

85–150 (–200);

corollas yellow.

120–140;

corollas yellow.

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

23–33 in 2–3 series, outer appressed, apices obtuse to acute, abaxial faces glabrous.

8–12 × 5–9 mm;

pappi 0.5–1.5 mm.

7–13 × 4–10 mm;

pappi 0–1 mm.