Flora of North America species comparison

branched, puberulent.

branched from bases, pubescent and gland-dotted.

opposite or alternate;

petioles 10–70 mm;

blades 3-nerved from bases, deltate-ovate, lance-ovate, or subcordate, 15–120 × 20–70 mm, bases acute, truncate, or subcordate, margins crenate, dentate, or serrate, apices attenuate, faces puberulent and gland-dotted.

opposite;

petioles 0–1 mm;

blades 3-nerved from bases (pinnately-veined distally), lanceolate to oblong, 40–160 × 10–75 mm, bases rounded to cordate (clasping), margins crenate to serrate, apices acute, faces densely to sparsely pubescent and stipitate-glandular.

4–30 mm, pubescent.

7–25 mm, densely stipitate-glandular.

cylindric or obconic, 7–12 mm.

cylindric to campanulate, 9–13 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

13–22;

corollas pale yellow or cream, often purple- or red-tinged, 6–8 mm.

30–40 in 5–7 series, greenish, 4–5-striate, unequal, margins scarious;

outer lance-ovate to lanceolate (pubescent, margins ciliate, apices long-acuminate), inner lanceolate to lance-linear (glabrous, apices acute to acuminate).

18–24 in 4–5 series, greenish, often purple-tinged, 3–8-striate, unequal, margins narrowly scarious (apices acute to acuminate);

outer ovate (6–8-striate, sparsely glandular at apices), inner narrowly lanceolate (3–4-striate, glabrous).

(nodding in flower and fruit) in loose, corymbiform or paniculiform arrays.

in paniculiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

2.8–4 mm, densely pubescent to hirtellous;

pappi of 35–60 white, barbellulate bristles.

= 18.