Flora of North America species comparison

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

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

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.

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.

2–10 mm (bracts 0–10+, scalelike).

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

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

broadly campanulate, 8–12 × 12–15 mm.

0(–7);

laminae 3–4.3 × 1–1.5 mm.

(0–)1–7;

laminae 7–10 × 1.5–2.8 mm.

7–70;

corollas ca. 5.5 mm.

7–20;

corollas 8–9.5 mm.

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.

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.

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

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

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

pappi off-white to brown, 6.5–8 mm.

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

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

= 18.

= 18.