Flora of North America species comparison

erect to spreading, green when young, becoming brown, branched proximally, densely floccose-tomentose, eglandular.

erect to spreading, green when young, often black-banded or splotched (from fungal infections), fastigiately branched, glabrous, gland-dotted, resinous.

ascending;

blades linear (adaxially sulcate), 10–30 × 1–2 mm, midnerves evident, apices acute, faces mostly densely tomentose, stipitate-glandular;

sometimes with axillary leaf fascicles.

mostly ascending;

blades filiform (adaxially sulcate), 10–35 × 0.5–1.5 mm, midnerves obscure, apices apiculate, faces glabrous, gland-dotted (in circular, deep pits), resinous;

axillary fascicles usually absent.

2–20 mm (usually leafy).

2–12 mm (bracts 0–10, leaflike).

obconic, 9–11 × 6–9 mm.

subcylindric, 5.5–9 × 3.5–7 mm.

0.

0.

10–22;

corollas 9–11 mm.

5–8;

corollas 5–7 mm.

20–30 in 2–3 series, green to tan, oblong to lanceolate, 5–10 × 0.8–1.5 mm, subequal, mostly chartaceous, outer herbaceous or herbaceous-tipped, midnerves usually evident, apices acute to acuminate, abaxial faces hairy, stipitate-glandular.

13–20 in 3–5 series, tan, lanceolate to elliptic, 1–5 × 0.5–1.7 mm, unequal, mostly chartaceous, membranous, midnerves not or slightly raised, faint on distal 1/2, (margins entire, sometimes ciliate distally) apices erect, acute to rounded, apiculate, abaxial faces glabrous, ± resinous.

borne singly or in cymiform arrays.

in paniculiform arrays (5–50 mm wide).

brownish, narrowly oblong, 5–6 mm, densely hairy;

pappi tan, 8–10 mm.

tan to brown, narrowly elliptic to oblanceoloid, 3.5–4.5 mm (ribs ca. 5), sericeous;

pappi off-white to brown, 5.5–6.5 mm.

= 18.