Flora of North America species comparison

branched, puberulent.

much branched, pubescent, 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 0–3 mm;

blades 3-nerved from bases, ovate to suborbiculate, 3–20 × 1–15 mm, bases acute to obtuse or rounded, margins entire, coarsely dentate or serrate, apices rounded to acute, faces glandular-villous or hispidulous.

4–30 mm, pubescent.

(bracteate) 2–10 mm, viscid to glandular-villous.

cylindric or obconic, 7–12 mm.

cylindric to narrowly campanulate, 7–12 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

8–28(–34);

corollas pale yellow, often purple-tinged, 5.5–7 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).

30–48 in 5–8 series, greenish, often purple-tinged, 3–5-striate, (recurved or spreading) unequal, margins scarious (apices acute to acuminate);

outer obovate to suborbiculate (glandular-pubescent; mid sometimes 3-toothed with middle tooth elongated), inner linear-oblong (glabrous or sparsely gland-dotted).

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

in loose, paniculiform arrays (often clustered at ends of branches).

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

3.5–4.7 mm, glabrous or hirtellous;

pappi of 18–24 white, barbellulate bristles.

= 18.