Annuals or, rarely, perennials, (compact, rarely sprawling). Stems erect, or, rarely, prostrate, (much-branched), to 8 dm. Cauline leaves: blade ovate to spatulate, or (distal) oblanceolate (less lobed), (smaller distally), margins crenate, dentate, or sinuate (not pinnatifid). Racemes 1–2 dm, (congested); rachis straight. Fruiting pedicels 1.8–8 mm. Flowers: sepals 3.5–5 mm, lateral pair not saccate basally; petals white to pale lavender, (well-developed or reduced to bristles), 4.6–9.7 × 1.5–3 mm, claw not distinct. Fruits (4-angled or 8-ribbed), cylindrical, 12–29 × 3–9 mm; proximal segment terete, (5–10 mm); terminal segment fusiform to turbinate, (7–15 mm), (beak flattened), apex acute, blunt, or retuse. Seeds: cotyledons accumbent to, sometimes, incumbent.
B.C., N.B., N.S., Ont., P.E.I., Que., Alaska, Calif., Conn., Del., Fla., Ga., Ill., Ind., Maine, Mass., Md., Mich., N.C., N.H., N.J., N.Y., Ohio, Oreg., Pa., R.I., S.C., Va., Wash., Wis., introduced in e Asia (Japan), Australia.
Subspecies 2 (2 in the flora).
Elements of Cakile edentula are native in North America; the typical variety is introduced on the Pacific Coast and probably on beaches of the Great Lakes Region.