Flora of North America species comparison

branched, puberulent.

branched from bases, densely white-tomentose.

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 0–2 mm;

blades 3-nerved from bases, ovate, 10–30 × 5–20 mm, bases obtuse to truncate, margins entire or serrulate, apices acute, faces densely white-tomentose, often gland-dotted.

4–30 mm, pubescent.

30–60 mm, canescent.

cylindric or obconic, 7–12 mm.

campanulate, 15–20 mm.

mostly 20–40(–70);

corollas pale yellow-green, 6.5–7.5 mm.

45–60;

corollas pale yellow or cream, often purple-tinged, 8.5–14 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).

38–44 in 6–8 series, greenish to purple, 6–9-striate, unequal, margins narrowly scarious-ciliate (faces white tomentose and gland-dotted, apices obtuse to acuminate);

outer ovate, inner lanceolate.

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

borne singly.

4–5 mm, hispidulous to hirtellous;

pappi of 20–30 white, barbellate bristles.

8.5–10 mm, sericeous, gland-dotted;

pappi of 42–44 white, barbellate bristles.

= 18.

= 18.