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, gland-dotted (in pits), 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.

ascending to spreading;

blades linear to narrowly elliptic (usually terete to sulcate adaxially), 10–25 × 0.8–1.5 mm, midnerves obscure to evident, apices usually acute, rarely rounded, sometimes mucronate, faces glabrous or sparsely hairy, gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 2–10 leaves, shorter than subtending leaves.

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

3–20 mm (leafy or bracteate).

obconic, 5–9 × 2–5 mm.

turbinate, 4–6 × 2–5 mm.

0.

usually 0, rarely 1–2;

laminae elliptic, 4–6 × 1–1.5 mm.

5–7;

corollas 5.8–8 mm.

6–16(–22);

corollas 5–6.5 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.

15–22 in 3–4 series, tan, ovate to elliptic, 2.5–7 × 0.6–1.5 mm, unequal, outer ± herbaceous, mid and inner mostly chartaceous, midnerves darker, strongly raised, uniform in widths, resinous, (margins membranous, ciliate especially distally) apices erect, acute, abaxial faces glabrous.

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

in racemiform to paniculiform arrays (1–15 × ca. 8 cm).

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

pappi off-white to brown, 6–7.5 mm.

tan to purple, 3.5–4 mm (7–8 ribbed), densely hairy;

pappi off-white to brown, sometimes reddish, 5–6.5 mm.

= 18.

= 36.