About 600 genera, 13,000 species, cosmopolitan. This large family contains many familiar foods: Arachis (peanut), Glycine (soybean), Lens (lentils), Medicago (alfalafa), Phaseolus (beans), Pisum (peas), and Trifolium (clover). It also includes ornamental plants: Lathyrus (sweet pea), Laburnum (golden-chain tree), Wisteria, and Cytisus (broom).