Flora of North America species comparison

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

green to reddish brown when young, branched, glabrous or sparsely hairy (sometimes tomentulose), often gland-dotted (sessile).

ascending to spreading;

blades linear to narrowly oblanceolate (terete or adaxially sulcate), 12–35 × 0.5–1.5 mm, midnerves obscure, apices acute, often mucronate, faces glabrous or moderately hairy, gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 4–10 leaves, shorter than subtending leaves.

ascending to spreading;

blades filiform to narrowly oblong (adaxially flat to sulcate), 20–70 × 0.5–4 mm, midnerves evident abaxially, apices acute, sometimes mucronate, faces glabrous or sparsely hairy, often gland-dotted (sessile) and appearing pustular;

axillary leaf fascicles sometimes present.

3–30 mm (leafy).

3–15 mm (bracts usually 0).

subcampanulate, 5–8 × 3.5–5.5 mm.

narrowly campanulate, 8–11 × 7–12 mm.

3–10;

laminae 5.5–7 × 1.5–2 mm.

0–5;

laminae elliptic, 8–12 × 1.5–3 mm.

11–25;

corollas 5–8 mm.

4–14;

corollas 7–11 mm.

20–26 in 4–6 series, tan, ovate to lanceolate or oblong, 3–7 × 1–1.8 mm, unequal, mostly chartaceous, outermost ± herbaceous-appendaged, midnerves thickened, darker resin ducts, slightly expanded apically, (margins membranous, fimbriate, especially distally) apices erect, acuminate to cuspidate, inner and mid acute to acuminate, abaxial faces usually glabrous, resinous.

17–36 in 3–6 series, green to tan, ovate to linear-lanceolate, 3.5–11 × 0.8–2 mm, subequal, herbaceous or herbaceous-tipped, mid and inner chartaceous, midnerves evident at least on distal 1/2, (margins ciliate) apices acute to acuminate or cuspidate, abaxial faces glabrous or hairy, sometimes gland-dotted, resinous.

in racemiform to thyrsiform-paniculiform arrays (to 30 × 3–12 cm).

in (leafy) racemiform to narrowly paniculiform arrays (2–15 cm).

tan to brown, subobovoid, 3.5–5 mm, glabrous or moderately hairy, more densely distally;

pappi off-white to brown, 6–7.5 mm.

tan to reddish brown, narrowly elliptic, 6–10 mm, glabrous or apically villous;

pappi tan to reddish brown, 6–9 mm.

= 18.

= 18.