Acmispon maritimus, synonym Lotus salsuginosus, is a species of legume native to Arizona, California and northwestern Mexico.

It grows in many types of mountain, desert, and scrub habitat, not necessarily near the coast.

It is an annual herb quite variable in morphology, from petite to bushy, hairless to roughly hairy, and prostrate to erect in form.

The slender stems are lined with leaves each made up of pairs of leaflets variable in shape and size.

Laboratory studies have shown this species, which occurs in wildfire-prone habitat such as chaparral, to have an increased rate of seed germination after exposure to heat.