Abstract:We examined the composition of plant tissues in the stomach and the feces of arctic hares (Lepus arcticusRoss) to obtain an index to digestibility of dietary components. The monocotyledonous sedges and to lesser extent grasses were over-represented in the feces as compared to the stomach, reflecting their lower digestibility in contrast to dicotyledonous willow (Salix arcticaPall.), forbs, and mountain avens (Dryas integrifoliaM. Vahl.). Arctic hares are similar to collared lemmings (Dicrostonyx groenlandicusTraill) and mountain hares (Lepus timidusLinnaeus) in this pattern of digestibility of plants available to them as forage.