Flora of North America species comparison

erect to spreading, green when young, becoming reddish brown, intricately branched, glabrous or sparsely hairy, sometimes resinous.

ascending to spreading, green when young, becoming dark brown then gray, branched, twigs stipitate-glandular, resin coated.

ascending to spreading;

blades linear (slightly concave), usually recurved, 5–15 × 0.5–1.5 mm, midnerves evident abaxially, apices acute, usually mucronate, faces glabrous or sparsely hairy, gland-dotted (not in deep pits), ± resinous;

axillary fascicles of 4–7 leaves usually present.

ascending;

blades elliptic to obovate, 9–18 × 2.5–4 mm, midnerves prominent with 2 fainter, collateral nerves, (margins undulate) apices usually obtuse to rounded, sometimes acute, apiculate, faces stipitate-glandular, resinous;

axillary leaf fascicles reduced or absent.

1–10 mm (glabrous or with conic hairs, resinous).

1–15 mm (bracts 3–8, gradually reduced, leafy).

subcylindric, 10–15 × 3–7 mm.

obconic, 5–7 × 2.5–3.5 mm.

0.

3–4;

laminae elliptic, 1.9–2.5 × 0.6–1.3 mm.

5–6;

corollas 9–10.5 mm.

8–9;

corollas 3.5–5.3 mm.

18–30 in 5–7 series, tan, ovate to elliptic, 2–12 × 1–2.5 mm, unequal, mostly chartaceous, occasionally herbaceous-tipped (mid bodies apically obtuse to truncate), appendages usually herbaceous, often spreading to recurved, midnerves faint, (margins membranous, fimbriate distally, otherwise sometimes ciliolate) apices acute to cuspidate, abaxial faces mostly resinous.

22–30 in 4–5 series, mostly tan, lanceolate to elliptic, 1.5–5 × 0.8–1.2 mm, strongly unequal, chartaceous (bodies abruptly constricted at bases of appendages), midnerves usually inconspicuous, (margins scarious, entire or minutely lacerate) apices acute to acuminate or cuspidate, abaxial faces glabrous, lightly resinous, sometimes gland-dotted.

borne singly or (2–7) in cymiform arrays (clusters 3–20 mm).

in cymiform arrays.

tan to brown, turbinate to narrowly oblanceolate, 5–7 mm (ribs 5–7), moderately hairy distally;

pappi off-white to brown, 9–10.5 mm.

tan, subcylindric to narrowly oblanceoloid, 2.2–4 mm, sericeous;

pappi whitish, 3–5 mm.

= 18.