Flora of North America species comparison

branched, puberulent.

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.

opposite;

petioles 2–4 mm;

blades 3-nerved from bases (abaxial venation raised, reticulate), lanceolate to oblong, 35–60 × 10–20 mm, bases acute or rounded, margins serrate, apices acute, faces sparsely to densely pubescent, gland-dotted.

4–30 mm, pubescent.

(bracteate) 1–8 mm, densely tomentose.

cylindric or obconic, 7–12 mm.

cylindric to turbinate, 13–15 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

19–24;

corollas pale yellow, 8–9.5 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).

34–40 in 6–8 series, greenish to stramineous, 5–8-striate, unequal, margins scarious (ciliate, apices acute);

outer ovate to lance-ovate (often villous toward tips), inner lanceolate (glabrous).

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

borne singly (in axils) or in paniculiform arrays.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

3.5–4 mm, hirsute;

pappi of 26–42 white, barbellate bristles.

= 18.

= 18.