Flora of North America species comparison

branched, puberulent.

branched, stipitate-glandular to 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.

mostly alternate (sometimes subopposite);

petioles 0;

blades obscurely 3-nerved from bases, elliptic, lance-linear, or oblong, 9–40 × 1–15 mm, bases acute to attenuate, margins entire, apices acute or obtuse, faces pubescent to villous, often stipitate-glandular.

4–30 mm, pubescent.

2–50 mm, glandular-pubescent.

cylindric or obconic, 7–12 mm.

cylindric to campanulate, 10–20 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

25–50;

corollas pale yellow-green or cream, often purple-tinged, 5–10 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).

25–35 in 4–6 series, greenish, 4–5-striate, unequal, margins scarious (sometimes ciliate, apices acute to acuminate);

outer ovate to lanceolate (gland-dotted to glandular-puberulent), inner linear-lanceolate to linear (glabrous).

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

borne singly or in corymbiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

3–7 mm, stipitate-glandular or hispidulous;

pappi of 18–25 white, barbellate to subplumose bristles.

= 18.