Flora of North America species comparison

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

erect to ascending, pale green when young, becoming whitish, fastigiately branched, glabrous, resinous at and distal to nodes.

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.

usually ascending, recurved when older;

blades filiform (adaxially sulcate), 15–35 × 0.5–2 mm, midnerves obscure, apices acute, often mucronate, faces glabrous, gland-dotted (in pits and sessile);

axillary leaf fascicles often present.

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

usually less than 10 mm (ebracteate).

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

turbinate, 6–10 × 2–4 mm.

0.

0.

10–25;

corollas 4–5 mm.

5–7;

corollas 4.7–7 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.

15–20 in 3–4 series, green to tan, ovate to lanceolate, 1.5–6 × 0.7–1.5 mm, unequal, outer herbaceous or herbaceous-tipped, inner mostly chartaceous (bodies truncate or tapering gradually or abruptly to bases of herbaceous appendages), midnerves faint (margins membranous, usually ciliate), apices (outer and mid) cuspidate (tips squarrose), abaxial faces glabrous, resinous.

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

in rounded, cymiform arrays (to 5 cm wide).

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

pappi tan, 3.5–4.5 mm.

tan, narrowly turbinate to subcylindric or narrowly ellipsoid, 4–5 mm (5-ribbed), moderately hairy to sericeous, often gland-dotted (glands spheric, glistening) distally;

pappi whitish, 4.5–5.5 mm.

= 18.

= 18.