Flora of North America species comparison

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

erect, simple, slender, wandlike, striate, villous or glabrate, glandular or eglandular.

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;

sessile;

blades linear to oblong or oblanceolate, 8–55 × 1–13 mm, bases cuneate, margins sharply serrate (teeth fine, sharp, bristly), apices obtuse, faces densely villous or adaxial sometimes glabrate or glabrous.

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

campanulate; staminate 4–6 mm, pistillate 6–8.5 mm.

30;

corollas 2.2–3 mm.

20–30;

corollas 3.5–5 mm.

20–30;

corollas 3 mm.

19–26;

corollas 4–7 mm.

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

lanceolate, 2–6 mm, margins scarious, medians green (villous), apices acute to acuminate, ciliate, sometimes glandular.

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

(50–100+) in compact paniculiform or corymbiform arrays.

1.5–2.2 mm, 5-nerved, glabrous;

pappi 4–6 mm.

2.5–3.6 mm, 5-nerved, villous, viscid;

pappi 7–8.5 mm.