Flora of North America species comparison

much branched, pubescent, gland-dotted.

branched, villous, 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 0–2 mm;

blades 3-nerved from bases, ovate, 15–30 × 5–25 mm, bases rounded to truncate, margins evenly to irregularly serrate, apices acute, faces viscid-glandular.

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

0–2 mm.

cylindric to narrowly campanulate, 7–12 mm.

broadly cylindric to campanulate, 14–18 mm.

8–28(–34);

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

44–60;

corollas yellow-green, often purple-tinged, 8–10 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).

(24–)36–42 in (3–)5–7 series, greenish or stramineous, often purple-tinged, 3–5-striate, unequal, margins narrowly scarious (apices acute to long-acuminate);

outer lance-ovate to lanceolate (sparsely gland-dotted), inner narrowly lanceolate (glabrous).

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

borne singly or in open, cymiform arrays (each head subtended by leaflike bracts).

3.5–4.7 mm, glabrous or hirtellous;

pappi of 18–24 white, barbellulate bristles.

5.5–7 mm, glabrate to hispidulous;

pappi of 20–30 white, barbellate bristles.

= 18.