Flora of North America species comparison

green, becoming whitish tan, ± ridged from leaf bases, densely puberulent.

green when young, soon becoming tan to white or grayish with age (bark of older stems flaky), branched, resinous when young, less so with age.

erect or closely ascending;

sessile;

blades with evident midnerves, linear to oblanceolate or narrowly oblong, 7–30 × 1.5–7 mm, flat to keeled, apices acute (often apiculate), faces glabrous or puberulent, sometimes sparsely stipitate-glandular.

ascending to spreading, becoming deflexed;

sessile;

blades with conspicuous midnerves plus 1–2 pairs of collaterals often evident, lanceolate to linear-elliptic, falcate, 6–35(–60) × 1–9 mm, often folded, margins sometimes undulate, apices acute, mucronate, ± spinulose, faces glabrous, ± gland-dotted, resinous.

obconic, 9–15 × 3–5 mm.

hemispheric, 8–12 × 9–15 mm.

5–6;

corollas 7–11 mm, lobes 1–2.1 mm;

style branches 2.4–3.3 mm, appendages 1.5–2 mm.

30–40+;

corollas 6–8.5 mm, lobes 1–1.7 mm;

style branches 2.8–3.5, appendages 1.3–1.7 mm.

20–25 in 4–6 series, in 5 strong vertical ranks, tan, often with green and/or purplish markings, midnerves evident throughout and ± expanded apically, lanceolate to elliptic, 3–8 × 0.5–1.5 mm, unequal, outer often herbaceous, inner scarious, strongly keeled, apices acute to acuminate, flat, faces puberulent.

40–60+ in 3–5 series, in spirals, mostly tan, ovate to lanceolate, unequal, 3–10 × 1–1.8 mm, greenish distally but scarcely herbaceous, apices acute or acuminate, often recurved, faces often glutinous.

in densely cymiform arrays, not overtopped by distal leaves.

usually in dense, cymiform arrays (to 7 cm wide), rarely borne singly, not overtopped by distal leaves.

tan, subcylindric (tapering proximally), ± flattened, 5–6.5 mm, faces glabrous, sparsely glandular distally;

pappi whitish tan, 5.5–7.5 mm.

tan, narrowly cylindric, 4–5 mm, glabrous or sparsely hairy, resinous;

pappi of 12–15, white or stramineous, lanceolate to lance-linear scales 2–4 mm.

= 18.

= 18.