Flora of North America species comparison

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

erect, terete, brittle, slightly striate, scabrous, stipitate-glandular, papillose-roughened.

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).

cauline (proximal withering before flowering, distal crowded in gascicles);

sessile;

blades linear to lanceolate or spatulate, 5–25 × 1–6 mm (stiff, coriaceous to fleshy), bases attenuate, margins sharply serrate (teeth 1–5 pairs, distal leaves often entire), faces glabrous, gland-dotted, resinous.

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

campanulate; staminate 4–5 mm, pistillate 5–6(–7) mm.

30;

corollas 2.2–3 mm.

15–20;

corollas 4–5 mm.

20–30;

corollas 3 mm.

15–20;

corollas 4–5 mm.

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

ovate to lanceolate, 1–5 mm, margins scarious, medians green, apices acute to acuminate, glabrous.

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

(10–20+ on densely leafy lateral branchlets) in spreading racemiform arrays.

1.5–2.2 mm, 5-nerved, glabrous;

pappi 4–6 mm.

1.8–3 mm, 8–10-nerved, minutely papillose-glandular;

pappi 8–10 mm (bristles rigid).