Lotus strigosus is a species of legume known by the common name strigose bird's-foot trefoil. It is native to the southwestern United States and adjacent Mexico, where it is known from many types of habitat, including disturbed areas. This is a prostrate annual herb. It is sometimes roughly hairy as its name suggests, but it may be somewhat woolly, fuzzy, or nearly hairless as well. Its slender branches are lined with leaves each made of several small leaflets. The flower cluster bears one or two yellow to orange or red pealike flowers, each with a corolla one half to one centimeter across. The fruit is a legume pod 1 to 3 centimeters long.