Flora of North America species comparison

branched, puberulent.

branched, pubescent.

opposite or alternate;

petioles 10–70 mm;

blades 3-nerved from bases, deltate-ovate, lance-ovate, or subcordate, 15–120 × 20–70 mm, bases acute, truncate, or subcordate, margins crenate, dentate, or serrate, apices attenuate, faces puberulent and 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.

4–30 mm, pubescent.

4–20 mm, pubescent.

cylindric or obconic, 7–12 mm.

cylindric to campanulate, 8–11 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

9–12;

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

30–40 in 5–7 series, greenish, 4–5-striate, unequal, margins scarious;

outer lance-ovate to lanceolate (pubescent, margins ciliate, apices long-acuminate), inner lanceolate to lance-linear (glabrous, apices acute to acuminate).

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).

(nodding in flower and fruit) in loose, corymbiform or paniculiform arrays.

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

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

2.5–5.3 mm, mostly velutinous, sometimes pubescent;

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

= 18.

= 18.