Flora of North America species comparison

branched from bases, pubescent.

branched, stipitate-glandular.

opposite;

petioles 1–5 mm;

blades 3-nerved from bases, oblong, obovate, or ovate, (15–)30–80 × 10–35 mm, bases cordate or truncate, margins crenate-serrate, apices acute to obtuse, faces sparsely pubescent and gland-dotted.

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.

2–15 mm, hispid to hirsute.

3–18 mm, stipitate-glandular.

cylindric to narrowly campanulate, 8–12 mm.

cylindric to campanulate, 7.5–8.5 mm.

10–16;

corollas purplish, 7–9 mm.

15–24;

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

17–20 in 3–5 series, pale green, often purplish, 5–9-striate, unequal, margins narrowly scarious-ciliate (apices acute to acuminate);

outer lance-ovate (sparsely pubescent), inner narrowly lanceolate (glabrous).

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).

erect, usually in loose, paniculiform arrays, sometimes borne singly.

in paniculiform arrays.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

2–3 mm, strigose;

pappi of 30–35 white, barbellulate bristles.

= 18.

= 18.