Flora of North America species comparison

branched, puberulent.

branched from bases, 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.

opposite;

petioles 1–5 mm;

blades 3-nerved from bases, oblong, obovate, or ovate, (15–)30–80 × 10–35 mm, bases cordate or truncate, margins crenate-serrate, apices acute to obtuse, faces sparsely pubescent and gland-dotted.

4–30 mm, pubescent.

2–15 mm, hispid to hirsute.

cylindric or obconic, 7–12 mm.

cylindric to narrowly campanulate, 8–12 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

10–16;

corollas purplish, 7–9 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).

17–20 in 3–5 series, pale green, often purplish, 5–9-striate, unequal, margins narrowly scarious-ciliate (apices acute to acuminate);

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

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

erect, usually in loose, paniculiform arrays, sometimes borne singly.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

= 18.

= 18.