Flora of North America species comparison

ascending to erect, green when young, fastigiately branched, glabrous or sparsely hairy, resinous.

erect, green when young, much branched, short-stipitate-glandular.

ascending to spreading;

blades filiform (terete or adaxially sulcate), 3–18(–23) × 0.3–1 mm, midnerves obscure, apices acute, often mucronate, faces glabrous or hairy, gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 2–12 leaves, shorter than subtending leaves.

erect to ascending;

blades oblanceolate to spatulate, 15–30 × 3–8 mm, midnerves and 2 smaller collateral veins evident, (margins crisped) apices acute, often apiculate, faces short-stipitate-glandular, resinous.

1–30 mm (bracts 4+, leaflike).

5–40 mm (bracts 0–3, reduced, leaflike).

subcampanulate, 5–8 × 2.5–4.5 mm.

campanulate, 12.5–15 × 5–9 mm.

2–6;

laminae 4–6 × 1–2 mm.

0.

5–14;

corollas 5.5–8 mm.

14–24;

corollas 9.5–10.8 mm.

16–24 in 3–5 series, mostly tan, ovate to elliptic, 2.5–7 × 0.6–1.5 mm, unequal, outer ± herbaceous or herbaceous-appendaged, mid and inner mostly chartaceous, midnerves raised, subapical resin ducts darker, ± thickened, expanded apically, (margins ciliate) apices erect, acute to acuminate or mucronate to cuspidate, abaxial faces glabrous or sparsely hairy.

24–35 in 3–4 series, green to tan, ovate or lanceolate to elliptic, 8–12 × 1–2.5 mm, subequal, outer herbaceous to chartaceous, inner mostly chartaceous, midnerves slightly raised, evident entire length of bodies, (margins ciliate) apices acute to acuminate or cuspidate (outer), appendages slender (outer), abaxial faces glabrous.

in cymiform to paniculiform arrays (2–9 cm wide).

usually in loose, paniculiform or congested, cymiform arrays, sometimes borne singly.

tan to brown, subcylindric, 2.5–4 mm (ribs 8–10), glabrous or hairy, more densely distally;

pappi off-white to brown, 5–7 mm.

tan to reddish, elliptic, 6.5–8.5 mm, sparsely, evenly strigose;

pappi usually off-white to brown, sometimes reddish, 8–9.5 mm.

= 18.

= 18.