Flora of North America species comparison

ascending to spreading, green when young, becoming dark brown then gray, branched, twigs stipitate-glandular, resin coated.

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

ascending;

blades elliptic to obovate, 9–18 × 2.5–4 mm, midnerves prominent with 2 fainter, collateral nerves, (margins undulate) apices usually obtuse to rounded, sometimes acute, apiculate, faces stipitate-glandular, resinous;

axillary leaf fascicles reduced or absent.

mostly ascending to spreading;

blades filiform (adaxially sulcate), 10–35 × 0.5–1.5 mm, midnerves obscure, apices acute to obtuse or rounded, faces glabrous, gland-dotted (in circular, deep pits), resinous.

1–15 mm (bracts 3–8, gradually reduced, leafy).

0.5–2 mm (bracts 0–3, mostly like outer phyllaries).

obconic, 5–7 × 2.5–3.5 mm.

obconic, 5–9 × 2–5 mm.

3–4;

laminae elliptic, 1.9–2.5 × 0.6–1.3 mm.

0.

8–9;

corollas 3.5–5.3 mm.

5–7;

corollas 5.8–8 mm.

22–30 in 4–5 series, mostly tan, lanceolate to elliptic, 1.5–5 × 0.8–1.2 mm, strongly unequal, chartaceous (bodies abruptly constricted at bases of appendages), midnerves usually inconspicuous, (margins scarious, entire or minutely lacerate) apices acute to acuminate or cuspidate, abaxial faces glabrous, lightly resinous, sometimes gland-dotted.

16–20 in 3–5 series (in vertical ranks), tan, lanceolate to oblong, 1–7 × 0.5–1.5 mm, strongly unequal, mostly chartaceous, midnerves mostly obscure, apices acute to rounded (outer each tipped with subspheric resin-gland), abaxial faces resinous.

in cymiform arrays.

in cymiform to racemiform arrays (1–3 cm wide).

tan, subcylindric to narrowly oblanceoloid, 2.2–4 mm, sericeous;

pappi whitish, 3–5 mm.

tan to brown, narrowly ellipsoid, 3–4 mm, sericeous;

pappi off-white to brown, 6–7.5 mm.

= 18.

= 18.