Acmispon wrangelianus is a species of legume known by the common names Chilean bird's-foot trefoil and Chile lotus. It is native to California, where it is widespread, and parts of adjacent states. Despite its common name, it is not from Chile. It can be found in many types of habitat, including disturbed areas. This is a hairy, prostrate annual herb. Its slender branches are lined with leaves each made of generally four small leaflets. The inflorescence is composed of a solitary yellow pealike flower around a centimeter wide. The fruit is a legume pod 1 to 2 centimeters long.