Flora of North America species comparison

branched, puberulent, gland-dotted.

branched, pubescent.

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, deltate-ovate to lanceolate, 7–30 × 4–28 mm, bases mostly obtuse to subtruncate, sometimes acuminate, margins serrate, apices acute, faces puberulent, gland-dotted.

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

10–30 mm, puberulent.

cylindric to campanulate, 7–10 mm.

cylindric to campanulate, 8–12 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

8–14;

corollas pale green or yellow, 5.5–6.5 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).

12–15 in 3–5 series, greenish, often purple-tinged, 5–7-striate, unequal, margins scarious (apices acute);

outer ovate to lance-ovate (puberulent, margins ciliate), inner narrowly lanceolate (glabrous).

in paniculiform arrays.

borne singly or in corymbiform-paniculiform arrays.

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

4.5–5 mm, densely pubescent;

pappi of 24–30 white, usually barbellate, sometimes subplumose, bristles.

= 18.

= 18.