Flora of North America species comparison

intricately branched, hirtellous, sparsely gland-dotted.

branched, stipitate-glandular to glandular-pubescent.

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.

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.

10–30 mm, villous, gland-dotted.

2–50 mm, glandular-pubescent.

cylindric, 9–11 mm.

cylindric to campanulate, 10–20 mm.

20–30;

corollas purplish, 6.5–7.5 mm.

25–50;

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

borne singly or in corymbiform arrays.

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.

3–7 mm, stipitate-glandular or hispidulous;

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