Flora of North America species comparison

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

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

usually ascending or spreading;

blades filiform to narrowly oblanceolate (terete or flattened, adaxially sulcate to concave), 12–55 × 0.5–3 mm, midnerves evident, usually not raised, apices acute to acuminate, faces glabrous or sparsely hairy, gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 2–15 leaves, shorter than subtending leaves.

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.

20–70 mm (mostly ebracteate).

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

hemispheric, 8–14 × 8–18 mm.

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

3–18;

laminae elliptic to lanceolate, 7–15 × 2–5 mm.

0.

16–60;

corollas 6–10 mm.

10–25;

corollas 4–5 mm.

24–32 in 2–3 series, green to tan, ovate to lanceolate, 4–10 × 0.5–3 mm, subequal, outer sometimes wholly herbaceous, usually mostly chartaceous, sometimes with green, medial stripes, midnerves conspicuous, raised, 1–2 collateral nerves often present, (margins membranous, minutely lacerate to fimbriate) apices acute to acuminate, abaxial faces usually glabrous, sometimes sparsely hairy, often stipitate-glandular, resinous.

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.

usually borne singly.

in rounded, cymiform arrays (to 10 cm wide).

tan to brown, narrowly oblanceoloid, somewhat flattened, 4–5 mm (2-ribbed), sericeous to villous;

pappi silvery, 5.8–7 mm.

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

pappi tan, 3.5–4.5 mm.

= 18.

= 18.