Flora of North America species comparison

erect to spreading, green when young, fastigiately branched, glabrous or sparsely hairy, gland-dotted, resinous.

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

mostly ascending to spreading, older deflexed;

blades filiform (sulcate to concave), 25–90 × 0.5–3 mm, midnerves obscure to evident, apices acuminate to attenuate, often mucronate, faces glabrous or sparsely hairy, gland-dotted (in deep, circular pits), resinous;

axillary leaf fascicles sometimes present.

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.

1–15 mm (bracts 0–7, scalelike, resembling phyllaries).

1–12 mm (bracts 0–3, scalelike).

turbinate to subcampanulate, 4–6 × 3.5–4.5 mm.

obconic, 12–15 × 4–8 mm.

0.

5–8;

laminae 3–4 × 0.7–2 mm.

10–25;

corollas 4–5 mm.

8–12;

corollas 9–10.5 mm.

20–25 in 3–4 series, tan, narrowly triangular to lanceolate, 1.5–5 × 0.5–1 mm, unequal, mostly chartaceous, midnerves evident, raised, mostly uniform in width to slightly dilated apically, (margins membranous, fimbriate) apices erect, acute, abaxial faces resinous.

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 rounded, cymiform arrays (to 10 cm wide).

(3–8) in cymiform arrays.

tan to brown, narrowly turbinate, 2–3 mm (5-ribbed), hairy;

pappi tan, 3.5–4.5 mm.

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

pappi off-white to brown, 7.5–9 mm.

= 18.