Flora of North America species comparison

branched, puberulent, gland-dotted.

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.

mostly opposite, sometimes alternate or subopposite;

petioles 0–3 mm;

blades 3-nerved from bases, lanceolate to obovate, 20–60 × 12–30 mm, bases ± cuneate, margins crenate to serrate, apices obtuse to acute, abaxial faces tomentose, often densely gland-dotted as well (venation raised, reticulate), adaxial faces pubescent and gland-dotted.

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

2–15 mm, densely tomentose, often gland-dotted.

cylindric to campanulate, 7–10 mm.

cylindric to campanulate, 8–13 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

10–21;

corollas greenish, yellow, or yellow-orange, often purple-tinged, 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).

18–22 in 5–7 series, greenish, often purplish-tinged, 6–8-striate, unequal, margins scarious (apices acute to acuminate);

outer ovate (sparsely villous, gland-dotted, lengths no more than 1/2 inner, margins long-ciliate), inner narrowly lanceolate to linear-oblong (glabrous).

in paniculiform arrays.

in ± dense, racemiform or paniculiform arrays.

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

3.5–5 mm, sparsely to densely pubescent;

pappi of 30–35, white to tawny, barbellate bristles.

= 18.

= 18.