Flora of North America species comparison

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

erect to ascending, green, becoming tan, branched, stipitate-glandular.

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.

ascending;

blades obovate to spatulate (flat), 10–30 × 4–12 mm, midnerves evident (1–2 collateral nerves sometimes present, abaxial reticulum of secondary veins often evident), (margins often undulate) apices obtuse, apiculate, faces densely stipitate-glandular;

axillary fascicules usually absent.

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

1–7 mm (stipitate-glandular).

turbinate, 3–5 × 3–5 mm.

obconic, 6–8 × 4–7 mm.

3–6;

laminae 4–5 × 1–2 mm.

4–9;

laminae elliptic, 3.5–6 × 1.2–1.8 mm.

6–16;

corollas 5–6 mm.

9–15;

corollas 6.2–6.8 mm.

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.

22–28 in 4–6 series, tan, ovate to elliptic, 1–6 × 0.5–1.2 mm, strongly unequal, mostly chartaceous, midnerves evident, (margins narrowly membranous, entire or minutely lacerate) apices acute to acuminate, abaxial faces mostly stipitate-glandular, resinous.

in irregular cymiform arrays (to 7 cm wide).

in cymiform to racemiform arrays (1–3 cm wide).

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

pappi off-white to brown, 3.5–5 mm.

tan to reddish brown, columnar, 3.5–4.5 mm [ribs unknown], villous;

pappi tan, 4–5.5 mm.

= 18.

= 36.