Flora of North America species comparison

erect, green becoming whitish, glabrous, ± resinous.

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.

ascending to spreading;

petiolate;

blades mostly 3-nerved (nerves reticulate, raised), elliptic to oblanceolate or obovate, 20–80 × (7–)10–25 mm (mostly larger basally, ± reduced distally), flat, apices acute, faces glabrous, gland-dotted.

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.

cylindric to turbinate, 6.5–8.8 × 1.8–2.5 mm.

hemispheric, 8–12 × 9–15 mm.

5(–6);

corollas 4–5 mm, lobes 0.8–1.2 mm;

style branches 2.2–2.7 mm, appendages 0.8–1.2 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.

19–24(–30) in 3–4 series, in vertical ranks, tan with apical green spot, midnerves evident distally, ovate to lanceolate, 1.5–6 × 0.7–1.5 mm, unequal, chartaceous, apices obtuse to acuminate, flat, faces glabrous.

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 condensed, cymiform arrays, not overtopped by leaves.

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

cylindric, 2.5–3 mm, faces hairy;

pappi tan, 3.1–3.9 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.