The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family, are a large and economically important family of flowering plants. vaxillary aestivation ( in which one large upper petal folds over and covers the other smaller petals.) and Diadelphous condition (One stamen filament is separate from the fused nine, a condition referred to as diadelphous) is charateristic feature of the family -Fabaceae. Fabaceae seeds are endospermic, most legume seeds are non-endospermic.