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Ten different types of legume tree seeds and pods collected from legume trees growing in the desert area of Tucson, Arizona were analyzed for proximate composition, acid detergent (ADF), dietary fiber, phytic acid (PA), trypsin inhibitor activity (TIA), minerals, and amino acids composition. Protein content of seeds ranged from 19.09% for desert willow to 25.66% for feather tree. The lipid content of seeds ranged from 1.7% for mesquite to 34.25% for ironwood. The soluble fiber content of seeds ranged from 4.23% for ironwood to 23.16% for green pale verde, while the insoluble fiber ranged from 19.71% for Acacia angustissima to 45.67% for sweet acacia. PA levels varied from 1.4 mg/g for feather tree seeds to 7.4mg/g for blue pale verde seeds. TIA was extremely high in feather tree and Acacia angustissima seeds (27,323 and 26,338 TIU/g, respectively). Mineral content varied among seeds, calcium and phosphorus being consistently the highest. Amino acid content was similar to that of other legumes with cysteine and methionine being low.