Flora of North America species comparison

much branched, pubescent, gland-dotted.

branched, stipitate-glandular.

alternate;

petioles 0–3 mm;

blades 3-nerved from bases, ovate to suborbiculate, 3–20 × 1–15 mm, bases acute to obtuse or rounded, margins entire, coarsely dentate or serrate, apices rounded to acute, faces glandular-villous or hispidulous.

alternate;

petioles 20–35 mm;

blades 3-nerved from bases, deltate-ovate or rhombic-ovate, 20–140 × 10–100 mm, bases truncate to cordate, margins irregularly dentate, apices acute, faces gland-dotted or glandular-pubescent.

(bracteate) 2–10 mm, viscid to glandular-villous.

3–18 mm, stipitate-glandular.

cylindric to narrowly campanulate, 7–12 mm.

cylindric to campanulate, 7.5–8.5 mm.

8–28(–34);

corollas pale yellow, often purple-tinged, 5.5–7 mm.

15–24;

corollas pale yellow-green or greenish white, 5–6.5 mm.

30–48 in 5–8 series, greenish, often purple-tinged, 3–5-striate, (recurved or spreading) unequal, margins scarious (apices acute to acuminate);

outer obovate to suborbiculate (glandular-pubescent; mid sometimes 3-toothed with middle tooth elongated), inner linear-oblong (glabrous or sparsely gland-dotted).

22–26 in 5–6 series, greenish, often purple-tinged, 3–4-striate, unequal, margins narrowly scarious (apices obtuse to acute);

outer ovate to lanceolate (glandular-hirtellous, shorter than inner), inner linear-lanceolate (glabrous).

in loose, paniculiform arrays (often clustered at ends of branches).

in paniculiform arrays.

3.5–4.7 mm, glabrous or hirtellous;

pappi of 18–24 white, barbellulate bristles.

2–3 mm, strigose;

pappi of 30–35 white, barbellulate bristles.

= 18.