Flora of North America species comparison

much branched, pubescent, gland-dotted.

intricately branched, hirtellous, sparsely gland-dotted.

alternate;

petioles 2–5 mm;

blades 3-nerved from bases, oblong to broadly ovate, 6–15 × 5–9 mm, bases narrowly cuneate, margins irregularly dentate, apices acute to obtuse, faces sparsely 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.

0.5–2.5 mm, glandular-viscid.

10–30 mm, villous, gland-dotted.

cylindric, 6–8 mm.

cylindric, 9–11 mm.

8–14;

corollas pale yellow-green, often purple-tinged, 4.8–5.7 mm.

20–30;

corollas purplish, 6.5–7.5 mm.

15–25 in 4–6 series, stramineous, 3–5-striate, unequal, (gland-dotted) margins scarious (apices obtuse to acute);

outer ovate, inner lanceolate.

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.

in (leafy) paniculiform or racemiform arrays.

in paniculiform arrays.

2.5–3 mm, sparsely pubescent or strigose;

pappi of 24–28 tawny, barbellate bristles.

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.

= 18.