The Wallawalla (Walula), including the Palouse (Palus) and Wauyukma, lived along the Wallawalla, Palouse, and Snake rivers in southeastern Washington. The Wallawalla now live on the Umatilla Indian Reservation in Oregon with the Umatilla and the Cayuse. They spoke a Sahaptin language of the Penutian phylum and numbered about five hundred in the 1980s.
Gunkel, Alexander (1979). Culture in Conflict: a Study of Contrasted Interrelations and Reactions between Euroamericans and the Wallawalla Indians of Washington State. Ann Arbor, Mich.: University Microfilms International.