Flora of North America species comparison

erect to ascending, green when young, fastigiately branched, glabrous, gland-dotted, resinous.

erect, green when young, becoming tan, branched, glabrous, resinous.

blades ascending, sometimes spreading when older, filiform to narrowly oblanceolate (adaxially sulcate to concave), 10–20 × 1–2 mm, midnerves not evident, apices acute, sometimes apiculate, faces glabrous, regularly gland-dotted (in circular, deep pits), resinous;

axillary leaf fascicles sometimes present, shorter than subtending leaves.

ascending;

blades oblanceolate, 7–30 × 1.5–3 mm, midnerves evident, apices acute to apiculate, faces glabrous, resinous;

axillary leaf fascicles usually present, much shorter than subtending leaves.

3–15 mm (bracts 3–20+, mostly leaflike, distal scalelike).

1–12 mm (bracts 0–3, scalelike).

turbinate, 3–5 × 3–5 mm.

obconic, 12–15 × 4–8 mm.

3–6;

laminae 4–5 × 1–2 mm.

5–8;

laminae 3–4 × 0.7–2 mm.

6–16;

corollas 5–6 mm.

8–12;

corollas 9–10.5 mm.

12–20 in 3–4 series, tan, linear to lanceolate, 1–3.5 × 0.5–1 mm, unequal, mostly chartaceous, sometimes herbaceous-tipped, erect, midnerves raised, somewhat expanded apically, subapical resin ducts usually present, (margins scarious to narrowly membranous, glabrous or ciliate) apices erect, acute, sometimes apiculate, abaxial faces glabrous.

18–28 in 3–4 series, tan, ovate or lanceolate to elliptic, 8–12 × 1–2.5 mm, subequal, outer herbaceous-tipped, inner mostly chartaceous, apices erect, acute or acuminate to cuspidate, abaxial faces glabrous, resinous.

in irregular cymiform arrays (to 7 cm wide).

(3–8) in cymiform arrays.

tan to brown, turbinate to narrowly oblanceolate, 3.5–4 mm (ribs ca. 5), villous;

pappi off-white to brown, 3.5–5 mm.

tan to reddish, ellipsoid, ca. 5 mm, densely hairy;

pappi off-white to brown, 7.5–9 mm.

= 18.