Introduced perennial pasture grasses provided the mainstay for the animal industries in the temperate high-rainfall region of Australia. Together with native grasses and introduced legumes, they are essential for sustainable animal production and assist in the amelioration of soil acidity, soil structure and water balance. This book is the result of the First National Perennial Grass Workshop which was held in October 1993 and involved representatives from State Departments of Agriculture and Primary Industries, CSIRO, NZ AgResearch, universities, major seed companies, rural industry research corporations and primary producers. The programme comprised invited reviews covering the major introduced species and native perennial grasses. This material was originally published in New Zealand Journal of Agricultural Research 37 (3) 1994.