Flora of North America species comparison

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

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

mostly ascending to spreading, often recurved distally;

blades filiform to narrowly oblanceolate (adaxially sulcate), 10–25 × 0.5–1.5 mm, midnerves obscure, apices apiculate, faces glabrous, resinous (axillary fascicles usually present).

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.

1–10 mm (bracts 0–15+).

1–7 mm (stipitate-glandular).

obconic, 5.5–8 × 3–5 mm.

obconic, 6–8 × 4–7 mm.

3–7;

laminae (white) 5.5–7 × 1.5–2 mm.

4–9;

laminae elliptic, 3.5–6 × 1.2–1.8 mm.

10–15;

corollas (white) 6–8 mm.

9–15;

corollas 6.2–6.8 mm.

22–34 in 4–5 series, green to tan, lanceolate to oblong, 1–6 × 0.5–1.5 mm, strongly unequal (sometimes outer subequal), mostly chartaceous, outer herbaceous or apically so (mid bodies often apically obtuse to notched, with subulate appendages), midnerves evident, (margins narrowly membranous, entire or serrulate, often ciliolate) apices acute to attenuate (outer often squarrose), abaxial faces glabrous, resinous.

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 loose, cymiform arrays (1–4 cm wide).

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

tan to brown, narrowly turbinate, 4.5–5 mm, moderately to densely sericeous;

pappi off-white to brown, 5.8–7.2 mm.

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

pappi tan, 4–5.5 mm.

= 18.

= 36.