440 LEGUMINOS^ 



b. Androecium monadelphous (in the single British species). 

 Calyx inflated ; fruit a one-seeded nut. 



Genus Anthyllis (Kidney- Vetoli). 



3. Leaves with three leaflets. 

 «. AndrcEcium diadelphous. 



(i) Flowers in a dense head. 



Faded corolla encloses the fruit. Genus T'rifolium (Clovers). 



Faded corolla drops away from the fruit ; legumes curved or spirally 

 twisted. Genus Medicago (Lucerne and Yellow Trefoil), 



(ii) Flowers in open elongated racemes. 



Fruit short, indehiscent, with one to three seeds. 



Genus Melilotus (Meltlot). 

 b. Androecium monadelphous. Genus Ononis (Rest Harrow). 



4. Leaves simple. 



(i) Leaves spinous. 



Calyx deeply two-lipped. Genus Ulex (Borse). 



(ii) Leaves flat. 



Calyx shortly two-lipped. Genus Genista (Dyer's Weed). 



5. Leaves digitate with more than three leaflets. 



Genus Lupinus (Lupin). 



