Flora of North America species comparison

(ascending) branched, pubescent, sometimes glandular-pubescent.

branched, stipitate-glandular to glandular-pubescent.

alternate;

petioles 4–10 mm;

blades 3-nerved from bases, rhombic-ovate, 10–40 × 10–20 mm, bases cuneate, margins laciniate-dentate, apices acute to obtuse, faces glabrate or gland-dotted.

mostly alternate (sometimes subopposite);

petioles 0;

blades obscurely 3-nerved from bases, elliptic, lance-linear, or oblong, 9–40 × 1–15 mm, bases acute to attenuate, margins entire, apices acute or obtuse, faces pubescent to villous, often stipitate-glandular.

5–40 mm, pubescent.

2–50 mm, glandular-pubescent.

narrowly campanulate, 7–11 mm.

cylindric to campanulate, 10–20 mm.

16–17;

corollas cream, 6–7 mm.

25–50;

corollas pale yellow-green or cream, often purple-tinged, 5–10 mm.

35–40 in 5–7 series, 3–5-striate, unequal, (glabrous, ± chartaceous) margins narrowly scarious (apices acute to acuminate);

outer ovate, inner lanceolate.

25–35 in 4–6 series, greenish, 4–5-striate, unequal, margins scarious (sometimes ciliate, apices acute to acuminate);

outer ovate to lanceolate (gland-dotted to glandular-puberulent), inner linear-lanceolate to linear (glabrous).

in dense, paniculiform arrays.

borne singly or in corymbiform arrays.

2–3 mm, pubescent;

pappi of 18–24 white, barbellate bristles.

3–7 mm, stipitate-glandular or hispidulous;

pappi of 18–25 white, barbellate to subplumose bristles.

= 18.