Flora of North America species comparison

intricately branched, hirtellous, sparsely gland-dotted.

much 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.

alternate;

petioles 0–3 mm;

blades 3-nerved from bases, ovate to suborbiculate, 3–20 × 1–15 mm, bases acute to obtuse or rounded, margins entire, coarsely dentate or serrate, apices rounded to acute, faces glandular-villous or hispidulous.

10–30 mm, villous, gland-dotted.

(bracteate) 2–10 mm, viscid to glandular-villous.

cylindric, 9–11 mm.

cylindric to narrowly campanulate, 7–12 mm.

20–30;

corollas purplish, 6.5–7.5 mm.

8–28(–34);

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.

30–48 in 5–8 series, greenish, often purple-tinged, 3–5-striate, (recurved or spreading) unequal, margins scarious (apices acute to acuminate);

outer obovate to suborbiculate (glandular-pubescent; mid sometimes 3-toothed with middle tooth elongated), inner linear-oblong (glabrous or sparsely gland-dotted).

in paniculiform arrays.

in loose, paniculiform arrays (often clustered at ends of branches).

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.

3.5–4.7 mm, glabrous or hirtellous;

pappi of 18–24 white, barbellulate bristles.