Flora of North America species comparison

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

erect to spreading, green when young, fastigiately branched, glabrous, resinous.

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.

usually ascending or spreading;

blades filiform to narrowly oblanceolate (terete or flattened, adaxially sulcate to concave), 12–55 × 0.5–3 mm, midnerves evident, usually not raised, apices acute to acuminate, faces glabrous or sparsely hairy, gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 2–15 leaves, shorter than subtending leaves.

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

20–70 mm (mostly ebracteate).

obconic, 5–9 × 2–5 mm.

hemispheric, 8–14 × 8–18 mm.

0.

3–18;

laminae elliptic to lanceolate, 7–15 × 2–5 mm.

5–7;

corollas 5.8–8 mm.

16–60;

corollas 6–10 mm.

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.

24–32 in 2–3 series, green to tan, ovate to lanceolate, 4–10 × 0.5–3 mm, subequal, outer sometimes wholly herbaceous, usually mostly chartaceous, sometimes with green, medial stripes, midnerves conspicuous, raised, 1–2 collateral nerves often present, (margins membranous, minutely lacerate to fimbriate) apices acute to acuminate, abaxial faces usually glabrous, sometimes sparsely hairy, often stipitate-glandular, resinous.

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

usually borne singly.

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

pappi off-white to brown, 6–7.5 mm.

tan to brown, narrowly oblanceoloid, somewhat flattened, 4–5 mm (2-ribbed), sericeous to villous;

pappi silvery, 5.8–7 mm.

= 18.

= 18.