Flora of North America species comparison

(ascending) branched, pubescent, sometimes glandular-pubescent.

branched, stipitate-glandular.

alternate;

petioles 4–10 mm;

blades 3-nerved from bases, rhombic-ovate, 10–40 × 10–20 mm, bases cuneate, margins laciniate-dentate, apices acute to obtuse, faces glabrate or 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.

5–40 mm, pubescent.

(leafy) 5–50 mm, stipitate-glandular.

narrowly campanulate, 7–11 mm.

cylindric to campanulate, 8–9 mm.

16–17;

corollas cream, 6–7 mm.

18–24;

corollas pale yellow-green or greenish white, 5–6 mm.

35–40 in 5–7 series, 3–5-striate, unequal, (glabrous, ± chartaceous) margins narrowly scarious (apices acute to acuminate);

outer ovate, inner lanceolate.

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).

in dense, paniculiform arrays.

borne singly (terminating lateral branches).

2–3 mm, pubescent;

pappi of 18–24 white, barbellate bristles.

2.5–3 mm, strigose;

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

= 18.

= 18.