Flora of North America species comparison

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

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

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.

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.

3–20 mm (leafy or bracteate).

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

turbinate, 4–6 × 2–5 mm.

broadly campanulate, 8–12 × 12–15 mm.

usually 0, rarely 1–2;

laminae elliptic, 4–6 × 1–1.5 mm.

(0–)1–7;

laminae 7–10 × 1.5–2.8 mm.

6–16(–22);

corollas 5–6.5 mm.

7–20;

corollas 8–9.5 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.

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.

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

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

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

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

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

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

= 36.

= 18.