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.

opposite;

petioles 0–1 mm;

blades 3-nerved from bases, oblong to linear, 20–60 × 2–10 mm, bases cuneate, margins entire or dentate, apices obtuse, faces pubescent, gland-dotted.

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

(20–)30–150 mm, puberulent, gland-dotted.

cylindric to campanulate, 7–10 mm.

cylindric to campanulate, 9–10 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

18–25;

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).

25–35 in 6–9 series, greenish, often purple-tinged, 3–9-striate, unequal, margins scarious (ciliate);

outer broadly ovate to orbiculate (glandular-pubescent, apices acute to cuspidate), inner lanceolate to linear-lanceolate (glabrous, apices acute to mucronate).

in paniculiform arrays.

in open, paniculiform arrays or borne singly (often terminal on lateral branches).

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

3–3.5 mm, pubescent to velutinous;

pappi of 30–40 white, barbellate bristles.

= 18.

= 18, 18 + 1.