Flora of North America species comparison

branched, puberulent.

branched, villous, stipitate-glandular.

opposite or alternate;

petioles 10–70 mm;

blades 3-nerved from bases, deltate-ovate, lance-ovate, or subcordate, 15–120 × 20–70 mm, bases acute, truncate, or subcordate, margins crenate, dentate, or serrate, apices attenuate, faces puberulent and 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.

4–30 mm, pubescent.

0–2 mm.

cylindric or obconic, 7–12 mm.

broadly cylindric to campanulate, 14–18 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

44–60;

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

30–40 in 5–7 series, greenish, 4–5-striate, unequal, margins scarious;

outer lance-ovate to lanceolate (pubescent, margins ciliate, apices long-acuminate), inner lanceolate to lance-linear (glabrous, apices acute to acuminate).

(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).

(nodding in flower and fruit) in loose, corymbiform or paniculiform arrays.

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

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

5.5–7 mm, glabrate to hispidulous;

pappi of 20–30 white, barbellate bristles.

= 18.

= 18.