Hosackia crassifolia, synonym Lotus crassifolius, is a species of legume found in the western United States.

[1] It is known by the common names big deervetch and broad-leafed lotus.

[2][3] The plant is native to western North America, in California, Oregon, and Washington (U.S. states); and into Baja California (Méxican state).

[2][3] Hosackia crassifolia is a long-lived, somewhat bushy plant which bears long straight stems with evenly spaced oval-shaped leaves.

[2] It produces thick bunches of yellow, pink-and-yellow, or scarlet-and-yellow pea flowers.