Flora of North America species comparison

branched, pubescent.

branched from near bases, glandular-pubescent.

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.

alternate;

petioles 5–60+ mm;

blades 3-nerved from bases, ovate to deltate, 10–100 × 10–90 mm, bases cordate to truncate, margins crenate to serrate, apices acute to rounded, faces puberulent to glabrate, often gland-dotted.

4–20 mm, pubescent.

1–5 mm, glandular-pubescent.

cylindric to campanulate, 8–11 mm.

cylindric to obconic, 7–12 mm.

9–12;

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

8–12;

corollas pale yellow-green, 5.5–8 mm.

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).

21–35 in 5–6 series, greenish, often purple-tinged, 3–4-striate, unequal, margins scarious;

outer ovate to lance-ovate (glabrous or sparsely glandular-pubescent, apices acute to acuminate), inner lanceolate (glabrous, apices obtuse to acuminate).

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

borne in (leafy) paniculiform arrays.

2.5–5.3 mm, mostly velutinous, sometimes pubescent;

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

2.5–3.5 mm, puberulent;

pappi of 24–30 white, barbellate bristles.

= 18.

= 18.