Flora of North America species comparison

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

erect to ascending, green when young, fastigiately branched, glabrous or sparsely hairy, 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 to spreading;

blades filiform (terete or flattened), 5–25 × 1–2 mm, midnerves obscure, apices acute often mucronate, faces glabrous or sparsely hairy, regularly gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 2–10 leaves, shorter than subtending leaves.

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

1–15 mm (bracts 3+, leaflike).

broadly campanulate, 8–12 × 12–15 mm.

subcampanulate, 6–8.5 × 5–7 mm.

(0–)1–7;

laminae 7–10 × 1.5–2.8 mm.

4–6;

laminae 4.5–6 × 1.2–2 mm.

7–20;

corollas 8–9.5 mm.

18–25;

corollas 6.5–8 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.

22–26 in 3–5 series, yellowish tan, ovate to lanceolate, 2.5–7 × 0.6–1.5 mm, unequal, mostly chartaceous, midnerves evident, sometimes with 1–2, collateral nerves, ± thickened, raised, often expanded distally, subapical resin ducts darker, narrow and only slightly thickened, (margins membranous, erose-ciliate) apices erect, acute to acuminate or cuspidate, abaxial faces glabrous or sparsely hairy.

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

mostly borne singly, sometimes in cymiform to racemiform arrays (4–6 cm wide).

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

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

tan to brown, subcylindric, 3.5–4 mm, sericeous to villous;

pappi off-white to reddish brown, 6.5–8 mm.

= 18.

= 18.