Flora of North America species comparison

erect to ascending, slender, striate-angled, glabrous, scarcely resinous.

erect, green, striate-angled, glabrous or slightly scurfy.

usually present at flowering;

sessile;

blades (1-nerved) linear-oblanceolate to narrowly oblong, 20–40(–80) × 4–8 mm, bases cuneate, margins evenly serrate (teeth spinulose, apices acute, faces finely gland-dotted, not resinous).

present at flowering; short-petiolate;

blades (1-nerved, lateral veins obscure) obovate to spatulate, 10–30 × 7–18 mm (somewhat fleshy), margins entire or occasionally with 1–2 short, broad teeth per side, bases tapering, apices broadly obtuse, submucronate or slightly retuse, faces glabrous, gland-dotted, sometimes resinous.

campanulate; staminate 3–6 mm, pistillate 3–6 mm.

obconic; staminate 3–4 mm, pistillate 5–7 mm.

30;

corollas 2.2–3 mm.

20–30;

corollas 4–5 mm.

20–30;

corollas 3 mm.

20–30;

corollas 3–4 mm.

lanceolate, 1–5 mm, margins scarious, erose-ciliate, medians green, apices acute or obtuse (erose, abaxial faces glabrous).

ovate to lanceolate, 1–4 mm, margins scarious-erose, medians green, apices obtuse to acuminate.

(10–50+) in terminal, compact, rounded paniculiform arrays.

(in terminal clusters) in (leafy) corymbiform or paniculiform arrays.

1.5–2.2 mm, 5-nerved, glabrous;

pappi 4–6 mm.

1–2 mm, 8–10-nerved, glabrous;

pappi 3–5 mm (scarcely elongating in fruit).