Flora of North America species comparison

branched, puberulent, gland-dotted.

much branched, pubescent, 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.

alternate;

petioles 0–3 mm;

blades 3-nerved from bases, ovate to suborbiculate, 3–20 × 1–15 mm, bases acute to obtuse or rounded, margins entire, coarsely dentate or serrate, apices rounded to acute, faces glandular-villous or hispidulous.

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

(bracteate) 2–10 mm, viscid to glandular-villous.

cylindric to campanulate, 7–10 mm.

cylindric to narrowly campanulate, 7–12 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

8–28(–34);

corollas pale yellow, often purple-tinged, 5.5–7 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).

30–48 in 5–8 series, greenish, often purple-tinged, 3–5-striate, (recurved or spreading) unequal, margins scarious (apices acute to acuminate);

outer obovate to suborbiculate (glandular-pubescent; mid sometimes 3-toothed with middle tooth elongated), inner linear-oblong (glabrous or sparsely gland-dotted).

in paniculiform arrays.

in loose, paniculiform arrays (often clustered at ends of branches).

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

3.5–4.7 mm, glabrous or hirtellous;

pappi of 18–24 white, barbellulate bristles.

= 18.