Flora of North America species comparison

branched, puberulent.

intricately branched, densely puberulent, often 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.

opposite or alternate;

petioles 1–2.5 mm;

blades 3-nerved from bases, ovate, 3–13 × 4–14 mm, bases obtuse to truncate, margins crenate-serrate, apices obtuse, faces gland-dotted and tomentulose to densely puberulent.

4–30 mm, pubescent.

0–3 mm, gland-dotted.

cylindric or obconic, 7–12 mm.

cylindric, 8–10 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

8–12;

corollas white, 4.5–5 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).

20–24 in 4–7 series, greenish or brownish, 3–4-striate, unequal, margins scarious (apices acute to apiculate);

outer broadly ovate (granular-puberulent), inner lanceolate to lance-linear (glabrous or tomentulose, often gland-dotted).

(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.

2–3 mm, scabrous;

pappi of 12–15 white, smooth or barbellulate bristles.

= 18.