Flora of North America species comparison

erect to spreading or recurved, green when young, soon becoming tan to brown, then nearly black when older, highly branched, twigs glabrous, glandular, usually resinous.

erect to spreading (close to the ground), green when young, becoming pale reddish brown, highly branched, coarsely long-stipitate-glandular.

ascending to spreading;

blades usually elliptic to oblanceolate, occasionally spatulate, 10–15 × 0.5–1.5 mm, mostly adaxially sulcate, margins entire, midnerves usually obscure to weakly evident, apices acute, apiculate, faces glandular, sometimes irregularly gland-dotted (in shallow pits), resinous;

axillary fascicles present, persistent.

(crowded) ascending;

blades elliptic to oblanceolate, 10–25 × 3–8 mm, midnerves evident (1–2 fainter, collateral nerves often present), (margins undulate) apices acute, apiculate, faces long-stipitate-glandular;

fascicles usually absent, (sometimes of 1–3 reduced leaves).

0.2–5 mm (mostly ebracteate, glabrous).

1–12 mm (bracts 3–20, crowded, leafy, grading into phyllaries).

obconic, 5.5–7.5 × 2.5–4 mm.

broadly obconic, 6–8 × 4–7 mm.

1–7;

laminae elliptic, 3–4 × 0.8–1.3 mm.

4–8;

laminae elliptic, 6–9 × 1–2 mm.

4–8;

corollas 4.5–6.5 mm.

12–22;

corollas 5.5–6.5 mm.

22–30 in 4–5 series, mostly tan, lanceolate to elliptic, 2–6.5 × 0.5–1.2 mm, strongly unequal, outer sometimes herbaceous or herbaceous-tipped (body apices obtuse or truncate to retuse, appendages erect), midnerves not evident or slightly raised, slightly expanded subapically, (mostly margins narrowly membranous, entire) apices acute to acuminate or attenuate, mid often aristate to cuspidate, abaxial faces glabrous, resinous.

25–30 in 3–4 series, green to tan, ovate to oblong, 4–8 × 0.7–1.5 mm, unequal, outer herbaceous or with herbaceous appendages, inner mostly chartaceous, midnerves usually evident, (margins entire, outer often herbaceous, inner scarious) apices acute to acuminate or attenuate, abaxial faces mostly stipitate-glandular.

in congested, cymiform arrays (0.5–2.5 cm wide).

usually in cymiform arrays.

tan, narrowly oblanceoloid, 4–5.5 mm, glabrous or densely sericeous;

pappi tan, 4–5.5 mm.

tan to brown, narrowly turbinate, 3–4.5 mm (usually 5-ribbed), moderately sericeous;

pappi tan, 4–5.5 mm.

= 18.

= 18.