Flora of North America species comparison

branched, puberulent, gland-dotted.

branched, villous, stipitate-glandular.

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, 15–30 × 5–25 mm, bases rounded to truncate, margins evenly to irregularly serrate, apices acute, faces viscid-glandular.

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

0–2 mm.

cylindric to campanulate, 7–10 mm.

broadly cylindric to campanulate, 14–18 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

44–60;

corollas yellow-green, often purple-tinged, 8–10 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).

(24–)36–42 in (3–)5–7 series, greenish or stramineous, often purple-tinged, 3–5-striate, unequal, margins narrowly scarious (apices acute to long-acuminate);

outer lance-ovate to lanceolate (sparsely gland-dotted), inner narrowly lanceolate (glabrous).

in paniculiform arrays.

borne singly or in open, cymiform arrays (each head subtended by leaflike bracts).

2–2.5 mm, sericeous;

pappi of 26–32 white, barbellate bristles.

5.5–7 mm, glabrate to hispidulous;

pappi of 20–30 white, barbellate bristles.

= 18.

= 18.