THE BEAN FAMILY. 



273 



300. Clover Tribe. 



A. Stamens monadelphous (all joined) : Ononis (Rest-harrow). 



B. Stamens diadeiphous (upper one free). 



1. Flowers in heads, pod straight : Trifolium (Clovers). 



2. Flowers in racemes, pod coiled : Medicago (Medioks). 



301. Lotus Tribe. 



A. Calyx shorter than corolla. 



1. Pod constricted between seeds : Lotus (Bird's-foot Trefoil). 



2. Pod divided by a longitudinal partition : Astragalus (Milk 



Vetch). 



B. Calyx longer than corolla : Anthyllis (Lady's-fingers). 



-- POST. PETAL 

 (STANDARD) 



,_- LATERAL PETA! 

 (ALA) 



ANT. PETALS 

 (CARINA) 



STIGMA' 

 5TAMINAL TUBE 



OVARY 



Fig. 98. Median Section, Flower of Culinary Pea. 

 Ala = wing-petal, carina = keel. 



302. Sainfoin Tribe. 



A. Pod cylindrical, many-jointed : Ornithopus (Bird's-foot). 



B. Pod flat, of several curved joints : Hippocrepis (Horse-shoe 



Vetch). 



C. Pod hard, one-seeded : Onobrychis /Sainfoin). 



S. B. 18 



