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 ascending, green when young, fastigiately branched, glabrous, gland-dotted, resinous.

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.

blades ascending, sometimes spreading when older, filiform to narrowly oblanceolate (adaxially sulcate to concave), 10–20 × 1–2 mm, midnerves not evident, apices acute, sometimes apiculate, faces glabrous, regularly gland-dotted (in circular, deep pits), resinous;

axillary leaf fascicles sometimes present, shorter than subtending leaves.

0.2–5 mm (mostly ebracteate, glabrous).

3–15 mm (bracts 3–20+, mostly leaflike, distal scalelike).

obconic, 5.5–7.5 × 2.5–4 mm.

turbinate, 3–5 × 3–5 mm.

1–7;

laminae elliptic, 3–4 × 0.8–1.3 mm.

3–6;

laminae 4–5 × 1–2 mm.

4–8;

corollas 4.5–6.5 mm.

6–16;

corollas 5–6 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.

12–20 in 3–4 series, tan, linear to lanceolate, 1–3.5 × 0.5–1 mm, unequal, mostly chartaceous, sometimes herbaceous-tipped, erect, midnerves raised, somewhat expanded apically, subapical resin ducts usually present, (margins scarious to narrowly membranous, glabrous or ciliate) apices erect, acute, sometimes apiculate, abaxial faces glabrous.

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

in irregular cymiform arrays (to 7 cm wide).

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

pappi tan, 4–5.5 mm.

tan to brown, turbinate to narrowly oblanceolate, 3.5–4 mm (ribs ca. 5), villous;

pappi off-white to brown, 3.5–5 mm.

= 18.

= 18.