Flora of North America species comparison

erect to spreading, green when young, fastigiately branched, glabrous, gland-dotted (in pits), resinous.

ascending to spreading;

blades linear to narrowly elliptic (usually terete to sulcate adaxially), 10–25 × 0.8–1.5 mm, midnerves obscure to evident, apices usually acute, rarely rounded, sometimes mucronate, faces glabrous or sparsely hairy, gland-dotted (in circular, deep pits), resinous;

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

3–20 mm (leafy or bracteate).

turbinate, 4–6 × 2–5 mm.

usually 0, rarely 1–2;

laminae elliptic, 4–6 × 1–1.5 mm.

6–16(–22);

corollas 5–6.5 mm.

15–22 in 3–4 series, tan, ovate to elliptic, 2.5–7 × 0.6–1.5 mm, unequal, outer ± herbaceous, mid and inner mostly chartaceous, midnerves darker, strongly raised, uniform in widths, resinous, (margins membranous, ciliate especially distally) apices erect, acute, abaxial faces glabrous.

in racemiform to paniculiform arrays (1–15 × ca. 8 cm).

tan to purple, 3.5–4 mm (7–8 ribbed), densely hairy;

pappi off-white to brown, sometimes reddish, 5–6.5 mm.

= 36.