Flora of North America species comparison

much branched, pubescent, gland-dotted.

branched, villous, stipitate-glandular.

alternate;

petioles 2–5 mm;

blades 3-nerved from bases, oblong to broadly ovate, 6–15 × 5–9 mm, bases narrowly cuneate, margins irregularly dentate, apices acute to obtuse, faces sparsely pubescent, gland-dotted.

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.

0.5–2.5 mm, glandular-viscid.

0–2 mm.

cylindric, 6–8 mm.

broadly cylindric to campanulate, 14–18 mm.

8–14;

corollas pale yellow-green, often purple-tinged, 4.8–5.7 mm.

44–60;

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

15–25 in 4–6 series, stramineous, 3–5-striate, unequal, (gland-dotted) margins scarious (apices obtuse to acute);

outer ovate, inner lanceolate.

(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 (leafy) paniculiform or racemiform arrays.

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

2.5–3 mm, sparsely pubescent or strigose;

pappi of 24–28 tawny, barbellate bristles.

5.5–7 mm, glabrate to hispidulous;

pappi of 20–30 white, barbellate bristles.

= 18.

= 18.