Three West African dwarf rams fitted with rumen cannula, were used in a completely randomized design for the study of the degradation of organic matter (OM) of groundnut cake (GNC), Panicum maximum (Guinea grass), rumen epithelial scraping (RES), and diets containing increasing levels of RES. Concentrate diets were formulated such that 0% (A), 50% (B), and 100% (C) of groundnut cake were replaced with RES in a diet containing 20% GNC. The soluble fraction ?a__ampersandsignrsquo; (86.81, 80.55, 68.83), insoluble fraction ?b__ampersandsignlsquo; (4.8, 3.88, 4.62) and rumen undegradable organic matter (RUOM) (8.39, 15.57, 26.55) obtained for GNC, grass and RES respectively varied significantly (p__ampersandsignlt;0.05). Significant variations (p__ampersandsignlt;0.05) were also observed for a, b and RUOM of the test diets A, B and C. Effective degradability (ED) of OM in GNC, grass and RES (at the outflow rate of 0.02) were 77.34, 58.68 and 38.73 respectively, varied significantly (p__ampersandsignlt;0.05). The ED of OM obtained for the diets decreased significantly (p__ampersandsignlt;0.05) with increased inclusion of RES. The RES contained (26.55%) significantly higher (p__ampersandsignlt;0.05) level of RUOM compared to either Panicum maximum (15.57%) or GNC (8.39).