Flora of North America species comparison

branched, puberulent.

much branched from near bases, tomentose, 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 0–1 mm;

blades obscurely 3–5-nerved from bases, ovate to cordate, 7–11 × 3–8 mm, bases rounded to subcordate, margins dentate-serrate, apices obtuse, faces tomentose, gland-dotted.

4–30 mm, pubescent.

1–5 mm, tomentose.

cylindric or obconic, 7–12 mm.

cylindric to turbinate, 10–12 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

20–24;

corollas pale yellow or cream, often purple-tinged, 6.2–7.5 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).

30–38 in 6–7 series, greenish, often red- or purplish-tinged, 3–6 striate, unequal, (recurved, tomentose, gland-dotted) margins scarious (ciliate, apices acute to acuminate);

outer lance-ovate, inner lanceolate.

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

(terminating elongate lateral branches) in paniculiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

3.5–5 mm, hispidulous;

pappi of 18–24 white or tawny, barbellate bristles.

= 18.

= 18.