Flora of North America species comparison

branched, puberulent.

branched, stipitate-glandular.

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.

alternate;

petioles 4–10 mm;

blades 3-nerved from bases, rhombic-ovate to lanceolate, 20–50 × 10–40 mm, bases rounded to cuneate, margins entire or irregularly dentate, apices acute, faces glabrous or sparsely gland-dotted.

4–30 mm, pubescent.

(leafy) 5–50 mm, stipitate-glandular.

cylindric or obconic, 7–12 mm.

cylindric to campanulate, 8–9 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

18–24;

corollas pale yellow-green or greenish white, 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).

22–26 in 5–6 series, greenish, often purple-tinged, 3–4-striate, subequal or unequal, margins narrowly scarious;

outer lanceolate to lance-ovate (often herbaceous, glandular-hirtellous, equaling or surpassing inner, apices acute to long-attenuate), inner lanceolate to lance-linear (glabrous, apices obtuse to acute).

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

borne singly (terminating lateral branches).

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

2.5–3 mm, strigose;

pappi of 30–35 white, smooth or barbellulate bristles.

= 18.

= 18.