Flora of North America species comparison

erect, striate, sharply angled, green distally, glabrous, resinous.

erect, green, slender and wandlike, striate-angled, glabrate proximally, hispidulous distally (near heads).

cauline (proximal withered and/or sparse at flowering);

sessile;

blades (1-nerved) linear-lanceolate, 5–15 × 1–2 mm, reduced to scales distally, thick, bases narrowed, margins entire (often revolute), apices acute, faces glabrous, minutely gland-dotted, resinous.

present at flowering (reduced, sparse);

sessile;

blades (1-nerved) linear to linear-lanceolate, 5–17 × 1–2 mm (reduced distally to subulate bracts), margins entire, apices acute, faces glabrous (sometimes minutely papillose).

cylindric to hemispheric;

staminate 4–5.2 mm, pistillate 3–8 mm.

funnelform or campanulate;

staminate 3–5.2 mm, pistillate 4–6 mm.

19–31;

corollas 2.5–3.5 mm.

8–18;

corollas 2–2.8 mm.

18–35;

corollas 4.2–5 mm.

(8–)12–18(–29);

corollas 3.3–4.2 mm.

ovate to lanceolate, 1–5 mm, margins yellowish, slightly scarious, medians green to yellow, apices rounded to acute (greenish, abaxial faces glabrous, resinous).

lanceolate, 1–4 mm, margins scarious, medians green (hispid), apices acute to acuminate.

borne singly (on nearly leafless branches) or (laterally on branchlets) in dense paniculiform arrays.

(on racemiform lateral branches) in paniculiform arrays.

2–2.6 mm, finely 8–10-nerved, glabrous;

pappi 7–12 mm.

1.5–2.5 mm, 5-nerved, hispid;

pappi 4.5–7 mm.

= 18.

= 18.