Plants sprawling. Leaves: blade margins deeply pinnatifid. Fruits (slenderly) lanceoloid, 15-24 mm, constricted at articulation, (weakly 4-angled or terete); terminal segment less than 2 times length of proximal, apex acute.

Flowering year-round. Coast-al strand; ca. 0 m; Fla., Tex.; Mexico (Tamaulipas).

Subspecies lanceolata in Texas and Mexico are suspected to be introduced from ballast and naturalized locally, sometimes occurring with Cakile geniculata.