Flora of North America species comparison

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

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

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.

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.

obconic;

staminate 3–4 mm, pistillate 5–7 mm.

campanulate;

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

20–30;

corollas 4–5 mm.

15–20;

corollas 4–5 mm.

20–30;

corollas 3–4 mm.

15–20;

corollas 4–5 mm.

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

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

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

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

1–2 mm, 8–10-nerved, glabrous;

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

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

pappi 8–10 mm (bristles rigid).