Flora of North America species comparison

branched, puberulent, gland-dotted.

branched from bases, densely white-tomentose.

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 0–2 mm;

blades 3-nerved from bases, ovate, 10–30 × 5–20 mm, bases obtuse to truncate, margins entire or serrulate, apices acute, faces densely white-tomentose, often gland-dotted.

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

30–60 mm, canescent.

cylindric to campanulate, 7–10 mm.

campanulate, 15–20 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

45–60;

corollas pale yellow or cream, often purple-tinged, 8.5–14 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).

38–44 in 6–8 series, greenish to purple, 6–9-striate, unequal, margins narrowly scarious-ciliate (faces white tomentose and gland-dotted, apices obtuse to acuminate);

outer ovate, inner lanceolate.

in paniculiform arrays.

borne singly.

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

8.5–10 mm, sericeous, gland-dotted;

pappi of 42–44 white, barbellate bristles.

= 18.

= 18.