Flora of North America species comparison

branched, puberulent.

(ascending) branched, pubescent, sometimes glandular-pubescent.

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;

petioles 4–10 mm;

blades 3-nerved from bases, rhombic-ovate, 10–40 × 10–20 mm, bases cuneate, margins laciniate-dentate, apices acute to obtuse, faces glabrate or gland-dotted.

4–30 mm, pubescent.

5–40 mm, pubescent.

cylindric or obconic, 7–12 mm.

narrowly campanulate, 7–11 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

16–17;

corollas cream, 6–7 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).

35–40 in 5–7 series, 3–5-striate, unequal, (glabrous, ± chartaceous) margins narrowly scarious (apices acute to acuminate);

outer ovate, inner lanceolate.

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

in dense, paniculiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

2–3 mm, pubescent;

pappi of 18–24 white, barbellate bristles.

= 18.

= 18.