Flora of North America species comparison

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

erect to ascending, green when young, fastigiately branched, glabrous, gland-dotted, 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.

blades ascending, sometimes spreading when older, filiform to narrowly oblanceolate (adaxially sulcate to concave), 10–20 × 1–2 mm, midnerves not evident, apices acute, sometimes apiculate, faces glabrous, regularly gland-dotted (in circular, deep pits), resinous;

axillary leaf fascicles sometimes present, shorter than subtending leaves.

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

3–15 mm (bracts 3–20+, mostly leaflike, distal scalelike).

obconic, 5–9 × 2–5 mm.

turbinate, 3–5 × 3–5 mm.

0.

3–6;

laminae 4–5 × 1–2 mm.

5–7;

corollas 5.8–8 mm.

6–16;

corollas 5–6 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.

12–20 in 3–4 series, tan, linear to lanceolate, 1–3.5 × 0.5–1 mm, unequal, mostly chartaceous, sometimes herbaceous-tipped, erect, midnerves raised, somewhat expanded apically, subapical resin ducts usually present, (margins scarious to narrowly membranous, glabrous or ciliate) apices erect, acute, sometimes apiculate, abaxial faces glabrous.

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

in irregular cymiform arrays (to 7 cm wide).

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

pappi off-white to brown, 6–7.5 mm.

tan to brown, turbinate to narrowly oblanceolate, 3.5–4 mm (ribs ca. 5), villous;

pappi off-white to brown, 3.5–5 mm.

= 18.

= 18.