3. Roots Sometimes have a symbiotic association with nitrogen-fixing bacteria, which induce formation of root nodules
4. Leaves Usually compound - pinnate, bipinnate, trifoliolate, rarely palmate sometimes simple or unifoliolate usually spiral basal pulvini often present leaflet folding responses (e.g., Mimosa spp.) Generally stipulate, sometimes stipellate
10. Gynoecium Unicarpellous Superior ovary 1 (rarely 2 or more) carpel 1 locule Style and stigma are solitary Marginal placentation Ovules are anatropous, bitegmic Nectaries often present
12. Mimosa Pudica also known as Makahiya, Sensitive plant, or Touch-me-not Leaves bipinnately compound, with 1 or 2 pinnaepairs, 10-26 leaflets per pinna Pedunculatepale pink or purple flower heads arise from leaf axils