Flora of North America species comparison

branched, puberulent, gland-dotted.

branched from bases, pubescent and gland-dotted.

alternate;

petioles 10–50 mm;

blades 3-nerved from bases, deltate or rhombic-ovate, 50–100 × 20–50 mm, bases acute to truncate, margins crenate or coarsely dentate, apices long-acuminate, abaxial faces sparsely villous, gland-dotted, adaxial faces glabrous or sparsely pubescent, often gland-dotted.

opposite;

petioles 0–1 mm;

blades 3-nerved from bases (pinnately-veined distally), lanceolate to oblong, 40–160 × 10–75 mm, bases rounded to cordate (clasping), margins crenate to serrate, apices acute, faces densely to sparsely pubescent and stipitate-glandular.

4–6 mm, puberulent, sparsely gland-dotted.

7–25 mm, densely stipitate-glandular.

cylindric to campanulate, 7–10 mm.

cylindric to campanulate, 9–13 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

13–22;

corollas pale yellow or cream, often purple- or red-tinged, 6–8 mm.

22–26 in 4–7 series, 3–5-striate, unequal, margins scarious (apices obtuse to acute);

outer ovate to lanceolate (often purple-tinged, glabrous or puberulent), inner linear to oblong (greenish, glabrous).

18–24 in 4–5 series, greenish, often purple-tinged, 3–8-striate, unequal, margins narrowly scarious (apices acute to acuminate);

outer ovate (6–8-striate, sparsely glandular at apices), inner narrowly lanceolate (3–4-striate, glabrous).

in paniculiform arrays.

in paniculiform arrays.

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

2.8–4 mm, densely pubescent to hirtellous;

pappi of 35–60 white, barbellulate bristles.

= 18.