Flora of North America species comparison

branched, puberulent, gland-dotted.

intricately branched, densely puberulent, often 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 or alternate;

petioles 1–2.5 mm;

blades 3-nerved from bases, ovate, 3–13 × 4–14 mm, bases obtuse to truncate, margins crenate-serrate, apices obtuse, faces gland-dotted and tomentulose to densely puberulent.

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

0–3 mm, gland-dotted.

cylindric to campanulate, 7–10 mm.

cylindric, 8–10 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

8–12;

corollas white, 4.5–5 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).

20–24 in 4–7 series, greenish or brownish, 3–4-striate, unequal, margins scarious (apices acute to apiculate);

outer broadly ovate (granular-puberulent), inner lanceolate to lance-linear (glabrous or tomentulose, often gland-dotted).

in paniculiform arrays.

in paniculiform arrays.

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

2–3 mm, scabrous;

pappi of 12–15 white, smooth or barbellulate bristles.

= 18.