Flora of North America species comparison

erect to ascending or divergent, much branched, sparsely hairy (hairs low, conic), resinous.

erect, green when young, becoming tan, branched, glabrous, resinous.

ascending to spreading, distally recurved;

blades narrowly obovate (sometimes conduplicate), 6–12 × 2–4 mm, midnerves raised adaxially, (margins often undulate) apices acute, mucronate to cuspidate, faces gland-dotted to resinous;

sometimes with axillary fascicles of 1–7 leaves.

ascending;

blades oblanceolate, 7–30 × 1.5–3 mm, midnerves evident, apices acute to apiculate, faces glabrous, resinous;

axillary leaf fascicles usually present, much shorter than subtending leaves.

1–15 mm (bracts 0 or 1–4, scalelike).

1–12 mm (bracts 0–3, scalelike).

narrowly campanulate, 8–12 × 4–6 mm.

obconic, 12–15 × 4–8 mm.

4–7;

laminae (white) 4–5.5 × 1–2 mm.

5–8;

laminae 3–4 × 0.7–2 mm.

10–18;

corollas (white) 5.5–7 mm.

8–12;

corollas 9–10.5 mm.

22–28 in 4–6 series, green to tan, squarrose or reflexed (outer), ovate to oblong, 2.5–7 × 0.6–1.5 mm, unequal, outer herbaceous or herbaceous-cuspidate, innermost chartaceous (bodies usually apically obtuse to retuse proximal to appendages), midnerves and subapical resin ducts darker, apices acute to acuminate, abaxial faces glabrous, resinous.

18–28 in 3–4 series, tan, ovate or lanceolate to elliptic, 8–12 × 1–2.5 mm, subequal, outer herbaceous-tipped, inner mostly chartaceous, apices erect, acute or acuminate to cuspidate, abaxial faces glabrous, resinous.

usually borne singly, sometimes in cymiform to racemiform arrays (4–6 cm wide).

(3–8) in cymiform arrays.

tan to brown, narrowly turbinate, 3.5–4 mm (5-ribbed), densely pilose, sericeous to villous;

pappi whitish, 5–6.5 mm.

tan to reddish, ellipsoid, ca. 5 mm, densely hairy;

pappi off-white to brown, 7.5–9 mm.

= 18.