Flora of North America species comparison

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

branched, pubescent, gland-dotted.

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.

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.

5–40 mm, pubescent.

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

narrowly campanulate, 7–11 mm.

cylindric to campanulate, 9–10 mm.

16–17;

corollas cream, 6–7 mm.

18–25;

corollas pale yellow, often purple-tinged, 5.5–7 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 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 dense, paniculiform arrays.

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

2–3 mm, pubescent;

pappi of 18–24 white, barbellate bristles.

3–3.5 mm, pubescent to velutinous;

pappi of 30–40 white, barbellate bristles.

= 18.

= 18, 18 + 1.