Conn., N.J., N.Y., Mass., Vt., Wash., Va., Del., Maine, Wis., Pacific Islands (Hawaii), N.H., N.C., Pa., R.I., B.C., N.B., Nfld. And Labr., N.S., Ont., P.E.I., Que., Calif., Ill., Ind., Md., Ohio, Minn., Mich., S.C., Oreg.
Ammophila has two species, one native to the coast of Europe and northern Africa, and one to eastern North America. Both species are effective sand binders and dune stabilizers. They are sometimes mistaken for Leymus arenarius and L. mollis, which grow in the same habitats and have a similar habit, but species of Leymus have more than 1 floret per spikelet.
Reznicek, A.A. and E.J. Judziewicz. 1996. A new hybrid species, xCalammophila don-hensonii (Ammophila breviligulata x Calamagrostis canadensis, Poaceae) from Grand Island, Michigan. Michigan Bot. 35:35-40