Flora of North America species comparison

branched, puberulent.

branched from bases, densely 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.

mostly opposite (sometimes alternate);

petioles 2–5 mm;

blades 3-nerved from bases, ovate to reniform, 4–15 × 7–25 mm, bases cordate to subcordate, margins crenate, apices obtuse, faces pubescent, gland-dotted.

4–30 mm, pubescent.

0–2 mm, densely pubescent, gland-dotted.

cylindric or obconic, 7–12 mm.

cylindric to broadly campanulate, 9–11 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

18–33;

corollas cream to pale yellow, often red or purple-tinged, 6–7.5 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).

35–40 in 7–9 series, greenish, often purple-tinged, 3–6-striate, unequal, margins scarious (apices obtuse to acute);

outer broadly ovate to lance-ovate (puberulent; margins ciliate), inner lanceolate (glabrous).

(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.

3–4 mm, sparsely hispidulous;

pappi of 24–28 white or tawny, barbellate bristles.

= 18.

= 18.