Flora of North America species comparison

much branched, pubescent, gland-dotted.

branched, pubescent.

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.

mostly alternate (sometimes subopposite);

petioles 0–3 mm;

blades 3-nerved from bases, lanceolate or lance-ovate, 10–50 × 4–20 mm, bases acute to obtuse, margins serrate or entire, apices acute, faces sparsely to densely pubescent, often gland-dotted or stipitate-glandular.

0.5–2.5 mm, glandular-viscid.

4–20 mm, pubescent.

cylindric, 6–8 mm.

cylindric to campanulate, 8–11 mm.

8–14;

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

9–12;

corollas pale yellow-green, often purple-tinged, 4.5–6 mm.

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

outer ovate, inner lanceolate.

15–20 in 4–5 series, greenish, often purple-tinged, 5–9-striate, unequal, margins narrowly scarious (often ciliate, apices acute to acuminate or subaristate);

outer lance-ovate (often puberulent), inner narrowly lanceolate (glabrous).

in (leafy) paniculiform or racemiform arrays.

usually in open, racemiform or paniculiform arrays, rarely borne singly.

2.5–3 mm, sparsely pubescent or strigose;

pappi of 24–28 tawny, barbellate bristles.

2.5–5.3 mm, mostly velutinous, sometimes pubescent;

pappi of 27–32 white, usually plumose, rarely barbellate, bristles.

= 18.

= 18.