The objective of this study was to assess chemical composition [crude protein (CP), neutral detergent fiber (NDF), in vitro dry matter degradability (IVOMD)], total condensed tannins (CT; from freeze dried samples) of 42 d regrowth of rhizoma perennial peanut (RPP; Arachis glabrata Benth), calliandra (Calliandra calothyrus), morus (Morus alba), cratylea (Cratylea argentea) and alfalfa (Medicago sativa). Ingestion rate of RPP, calliandra and cratylea when lambs were fed these forages as a supplement were also estimated.  Lambs (n = 8) were maintained on guineagrass (Panicum maximum Jacq.) pastures during the day (from 7 AM to 2 PM), penned at 2:00 PM and provided with freshly cut RPP, calliandra and cratylea for 120 d.  Lambs were weighed every 21 d and ADG was estimated.  The CP concentration was highest (P<0.05) for alfalfa (23.6%) and cratylea (20.3%) and lowest for RPP (15%).  Concentrations of NDF were lower for alfalfa (16.2%) and morus (32.1%) than RPP, cratylea or calliandra.  Morus IVOMD (70.6%) was higher (P<0.05) than RPP (61.9%) or alfalfa (58.4%). Calliandra and cratylea had very low IVOMD (30 and 51%, respectively).  Total CT (12%) concentration was much higher (P < 0.001) for calliandra than for morus (2.9%) and RPP (1.9%) forages, while a little amount of CT was detected for alfalfa (0.3%) and cratylea (0.8%).  Lambs consumed higher (P<0.05) RPP and cratylea than calliandra throughout the study, but ADG (0.13 lbs d^-1) was not affected.  This research indicates that there is variability in nutritive value among these forages, and characterization of N fraction is suggested to determine potential N availability in the gastrointestinal tract.  Both RPP and cratylea are more readily consumed than calliandra by sheep and may offer potential for use in silvopasture systems in Puerto Rico.