Flora of North America species comparison

intricately branched, hirtellous, sparsely gland-dotted.

branched, pubescent, gland-dotted.

alternate;

petioles 1–2 mm;

blades (venation obscure) oblong to spatulate, 3–12 × 1–4 mm, bases acute to acuminate, margins entire, apices acute to obtuse, faces tomentose, 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.

10–30 mm, villous, gland-dotted.

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

cylindric, 9–11 mm.

cylindric to campanulate, 9–10 mm.

20–30;

corollas purplish, 6.5–7.5 mm.

18–25;

corollas pale yellow, often purple-tinged, 5.5–7 mm.

20–25 in 5–6 series, greenish, often purple-tinged, 4–5-striate, unequal, (sparsely villous, gland-dotted) margins narrowly scarious (apices rounded, mucronate);

outer ovate to lanceolate (ciliate), inner linear-oblong.

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 paniculiform arrays.

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

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.

3–3.5 mm, pubescent to velutinous;

pappi of 30–40 white, barbellate bristles.

= 18, 18 + 1.