Flora of North America species comparison

erect to ascending, green when young, soon reddish to brownish, branched, glabrous or tomentose, stipitate-glandular.

spreading to ascending or erect, green when young, highly branched, glabrous, gland-dotted (sometimes in pits), resinous.

mostly erect or ascending;

blades spatulate (flat), 15–30 × 3–7 mm, midnerves (and sometimes 2 fainter, collateral nerves) evident (slightly raised abaxially), apices obtuse, mucronate, faces glabrous or tomentose and/or stipitate-glandular;

axillary fascicles absent.

ascending-spreading;

blades cuneate to spatulate, 2–25 × 2–16 mm, midnerves evident or faint, (margins usually flat) apices rounded, obtuse, or retuse, sometimes mucronate, faces glabrous, gland-dotted (in pits), thickly resinous;

axillary leaf fascicles rarely present.

usually less than 20, rarely to 100 mm (leafy).

2–10 mm (bracts 0–10+, scalelike).

broadly campanulate, 8–12 × 12–15 mm.

turbinate to narrowly campanulate, 6–12.5 × 4–14 mm.

(0–)1–7;

laminae 7–10 × 1.5–2.8 mm.

0(–7);

laminae 3–4.3 × 1–1.5 mm.

7–20;

corollas 8–9.5 mm.

7–70;

corollas ca. 5.5 mm.

18–28 in 2–3 series, green to tan, lanceolate to elliptic, 10–14 × 1.3–2.7 mm, subequal (outer sometimes slightly longer than inner), outer herbaceous or with herbaceous appendages, inner mostly chartaceous, midnerves (and often 2 collateral nerves) evident, (margins often narrowly membranous, fimbriate or tomentose) apices acute, acuminate to cuspidate, abaxial faces stipitate-glandular.

20–60 in 3–7 series, tan, ovate to lanceolate, 2–6 × 0.5–2.5 mm, unequal, mostly chartaceous, sometimes each with herbaceous subapical patch, midnerves evident on proximal 1/2 or throughout, subapical resin ducts 0 or slightly darker, thickened and expanded, (margins membranous, weakly lacerate) apices acute to acuminate or obtuse, abaxial faces glabrous.

(12–22) usually in (leafy) congested, cymiform or racemiform arrays, rarely borne singly.

usually borne singly, sometimes in rounded, cymiform arrays (to 5 × 8 cm).

tan to reddish, ellipsoid, 5–7 mm, glabrous or distally hairy;

pappi off-white to reddish brown, 7–9 mm.

tan to brown, turbinate, 2.5–3 mm, sericeous to villous;

pappi off-white to brown, 6.5–8 mm.

= 18.

= 18.