Flora of North America species comparison

erect to spreading, green when young, fastigiately branched, glabrous or sparsely hairy, gland-dotted, resinous.

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

mostly ascending to spreading, older deflexed;

blades filiform (sulcate to concave), 25–90 × 0.5–3 mm, midnerves obscure to evident, apices acuminate to attenuate, often mucronate, faces glabrous or sparsely hairy, gland-dotted (in deep, circular pits), resinous;

axillary leaf fascicles sometimes present.

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.

1–15 mm (bracts 0–7, scalelike, resembling phyllaries).

3–15 mm (bracts usually 0).

turbinate to subcampanulate, 4–6 × 3.5–4.5 mm.

narrowly campanulate, 8–11 × 7–12 mm.

0.

0–5;

laminae elliptic, 8–12 × 1.5–3 mm.

10–25;

corollas 4–5 mm.

4–14;

corollas 7–11 mm.

20–25 in 3–4 series, tan, narrowly triangular to lanceolate, 1.5–5 × 0.5–1 mm, unequal, mostly chartaceous, midnerves evident, raised, mostly uniform in width to slightly dilated apically, (margins membranous, fimbriate) apices erect, acute, abaxial faces 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 rounded, cymiform arrays (to 10 cm wide).

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

tan to brown, narrowly turbinate, 2–3 mm (5-ribbed), hairy;

pappi tan, 3.5–4.5 mm.

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

pappi tan to reddish brown, 6–9 mm.

= 18.

= 18.