Flora of North America species comparison

branched, puberulent.

branched, coarsely scabrous.

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.

alternate to subopposite;

petioles 1–5 mm;

blades 3-nerved from bases, lanceolate to lance-ovate, 20–40 × 7–20 mm, bases rounded to broadly cuneate, margins entire or serrate, apices acute to acuminate, faces sparsely pubescent, stipitate-glandular.

4–30 mm, pubescent.

5–45 mm, pubescent, stipitate-glandular.

cylindric or obconic, 7–12 mm.

cylindric to campanulate, 7–11 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

11–22;

corollas pale yellow or cream, 4.7–6 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).

16–20 in 4–5 series, greenish, often purple-tinged, 4–8-striate, unequal, margins narrowly scarious, often ciliate (apices acute to long-attenuate);

outer lance-ovate (pubescent), inner narrowly lanceolate (glabrous).

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

in open, racemose or paniculiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

4–5 mm, silvery-setulose.

of 25–34 white, plumose bristles.

= 18.