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 or sparsely hairy, 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.

mostly ascending to spreading, often recurved distally;

blades filiform to narrowly oblanceolate (adaxially sulcate), 10–25 × 0.5–1.5 mm, midnerves obscure, apices apiculate, faces glabrous, resinous (axillary fascicles usually present).

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

1–10 mm (bracts 0–15+).

obconic, 5–9 × 2–5 mm.

obconic, 5.5–8 × 3–5 mm.

0.

3–7;

laminae (white) 5.5–7 × 1.5–2 mm.

5–7;

corollas 5.8–8 mm.

10–15;

corollas (white) 6–8 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.

22–34 in 4–5 series, green to tan, lanceolate to oblong, 1–6 × 0.5–1.5 mm, strongly unequal (sometimes outer subequal), mostly chartaceous, outer herbaceous or apically so (mid bodies often apically obtuse to notched, with subulate appendages), midnerves evident, (margins narrowly membranous, entire or serrulate, often ciliolate) apices acute to attenuate (outer often squarrose), abaxial faces glabrous, resinous.

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

in loose, cymiform arrays (1–4 cm wide).

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

pappi off-white to brown, 6–7.5 mm.

tan to brown, narrowly turbinate, 4.5–5 mm, moderately to densely sericeous;

pappi off-white to brown, 5.8–7.2 mm.

= 18.

= 18.