Flora of North America species comparison

branched, puberulent.

intricately branched, hirtellous, sparsely 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.

alternate;

petioles 1–2 mm;

blades (venation obscure) oblong to spatulate, 3–12 × 1–4 mm, bases acute to acuminate, margins entire, apices acute to obtuse, faces tomentose, gland-dotted.

4–30 mm, pubescent.

10–30 mm, villous, gland-dotted.

cylindric or obconic, 7–12 mm.

cylindric, 9–11 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

20–30;

corollas purplish, 6.5–7.5 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).

20–25 in 5–6 series, greenish, often purple-tinged, 4–5-striate, unequal, (sparsely villous, gland-dotted) margins narrowly scarious (apices rounded, mucronate);

outer ovate to lanceolate (ciliate), inner linear-oblong.

(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.

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.

= 18.