Annuals. Leaves usually pinnately lobed or pinnatifid, sometimes entire. Involucres hemispheric to obconic. Phyllaries falling with cypselae, distinct. Receptacles conic, smooth, muricate, or pitted, glabrous or hairy. Ray corollas yellow, laminae 1–10 mm, floral pigments remaining yellow in dilute aqueous alkali. Disc corolla lobes 5; anther appendages ovate to obovate; style apices ± deltate, glabrous or with apical tufts of hairs and subapical fringes of shorter hairs. Cypselae 1.5–3 mm; epappose or pappose. 2n = 8, 10.

Distribution

w North America, nw Mexico.

Discussion

Species 3 (3 in the flora).

Selected References

None.

Lower Taxa

Lasthenia coronaria, Lasthenia maritima, Lasthenia minor

Key

1	Stems usually glandular-puberulent (herbage sweetly scented)	Lasthenia coronaria
1	Stems glabrous or hairy (at nodes and distally), or ± woolly (herbage not sweetly scented)	> 2
2	Ray laminae 1–3 mm; pappi 0, or of 4–6(–12) aristate scales plus 4–5+ shorter, laciniate scales; coastal and offshore; British Columbia, California, Oregon, Washington	Lasthenia maritima
2	Ray laminae 4–8 mm; pappi 0, or of 2–3(–4) aristate scales plus 4–5+ shorter, fimbri-ate scales; coastal and inland; c California	Lasthenia minor