Flora of North America species comparison

branched, puberulent.

branched, pubescent.

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;

petioles 0–1 mm;

blades 3-nerved from bases, deltate-ovate to lanceolate, 7–30 × 4–28 mm, bases mostly obtuse to subtruncate, sometimes acuminate, margins serrate, apices acute, faces puberulent, gland-dotted.

4–30 mm, pubescent.

10–30 mm, puberulent.

cylindric or obconic, 7–12 mm.

cylindric to campanulate, 8–12 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

8–14;

corollas pale green or yellow, 5.5–6.5 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).

12–15 in 3–5 series, greenish, often purple-tinged, 5–7-striate, unequal, margins scarious (apices acute);

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

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

borne singly or in corymbiform-paniculiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

4.5–5 mm, densely pubescent;

pappi of 24–30 white, usually barbellate, sometimes subplumose, bristles.

= 18.

= 18.