ACE-1 perennial cereal rye (PC rye) (Secale cereale) was developed by the Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta. This cultivar, tested as LRC 96-1 in western Canada, was developed for silage and greenfeed. ACE-1 is easy to establish, competes well with weeds, grows early in spring, produces more biomass than barley and fall rye under dryland and irrigated conditions, but produces less seed than high yielding fall rye cultivars. Forage quality of ACE-1 was found to be similar to barley. Key words: Cultivar description, rye, perennial, Secale cereale