A comprehensive ethnobotany of the Thompson Indians of British Columbia. This text includes the work of James Teit (1896-1918) who pioneered Thompson ethnobotanical work. This means that the time span covered by the informants goes back as far as 90 years. Significantly, only 20 plant species are not recognized as usable by contemporary elders. The text takes the form of an inventory of species named or used by the Thompsons. Entries are arranged alphabetically by scientific name; Thompson Salish names are given as well. This is followed by a summary of ethnobiological data. Plants are grouped as food, materials, or medicine. The materials section is of particular interest since it describes plants used for fiber, dyes, stains, paints, and preservatives. Sources of resin and pitch are described as well as plants used as cleaning agents or harvested for their scent. The cultural role of plants and the methods of preparation for consumption or use are described.