Flora of North America species comparison

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

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

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).

usually ascending or spreading;

blades filiform to narrowly oblanceolate (terete or flattened, adaxially sulcate to concave), 12–55 × 0.5–3 mm, midnerves evident, usually not raised, apices acute to acuminate, faces glabrous or sparsely hairy, gland-dotted (in circular, deep pits), resinous;

axillary fascicles of 2–15 leaves, shorter than subtending leaves.

1–10 mm (bracts 0–15+).

20–70 mm (mostly ebracteate).

obconic, 5.5–8 × 3–5 mm.

hemispheric, 8–14 × 8–18 mm.

3–7;

laminae (white) 5.5–7 × 1.5–2 mm.

3–18;

laminae elliptic to lanceolate, 7–15 × 2–5 mm.

10–15;

corollas (white) 6–8 mm.

16–60;

corollas 6–10 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.

24–32 in 2–3 series, green to tan, ovate to lanceolate, 4–10 × 0.5–3 mm, subequal, outer sometimes wholly herbaceous, usually mostly chartaceous, sometimes with green, medial stripes, midnerves conspicuous, raised, 1–2 collateral nerves often present, (margins membranous, minutely lacerate to fimbriate) apices acute to acuminate, abaxial faces usually glabrous, sometimes sparsely hairy, often stipitate-glandular, resinous.

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

usually borne singly.

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 brown, narrowly oblanceoloid, somewhat flattened, 4–5 mm (2-ribbed), sericeous to villous;

pappi silvery, 5.8–7 mm.

= 18.

= 18.