Fabaceae- Mimosoideae

1. Fabaceae ( Mimosoideae )

2. Mimosoideae Consists of herbs, shrubs, trees, or vines, with spines sometimes present

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

5. Flowers Actinomorphic / Radial bisexual, sometimes unisexual Corolla - typically 5 - distinct petals -basally fused petals ( valvate in bud) Hypanthium sometimes present

6. Inflorescence Variable, typically bracteate

7. Fruit Generally a legume sometimes indehiscent, winged (samara), drupe-like or divided into transverse partitions ( loment )

8. Anther Longitudinal, rarely poricidal in dehiscence

9. 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

10. Androecium Stamens are numerous, distinct and basally fused

11. Mimosa Pudica also known as Makahiya , Sensitive plant , or Touch-me-not Leaves bipinnately compound, with 1 or 2 pinnae pairs, 10-26 leaflets per pinna Pedunculate pale pink or purple flower heads arise from leaf axils

12. Mimosa Pudica fruit consists of clusters of 2-8 pods, which break into 2-5 segments and contain pale brown seeds -flowers pollinated by wind and insects seeds have hard seed coats which restrict germination