160 



FAB ACE AE. 



Tribe II. GENISTEAE. 



Tribe III. TRIFOLIEAE. 

 Tribe IV. LOTEAE. 



Tribe V. GALEGEAE. 



Tribe VI. HEDYSAREAE. 



Tribe VII. PHASEOLEAE. 



Tribe VIII. VICIEAE. 



FAMILY 13. FABACEAE. PEA FAMILY. 



Herbs, shrubs, trees, or vines. Leaves alternate: blades 1-compound, 

 sometimes 1-foliolate, or rarely simple. Flowers mostly perfect, irregular. 

 Calyx of 5 more or less unequal partially united sepals. Corolla of 5 

 unequal distinct or nearly distinct petals which are, 2 keel-petals and 2 

 wings, and 1 standard which surrounds the others. Androecium of 10 

 monadelphous, diadelphous or rarely distinct stamens, or rarely of 9 or 5. 

 Gynoecium 1-carpellary. Ovary superior. Fruit a dehiscent or indehiscent 

 legume or a loment. 



Stamens 10 : filaments distinct. Tribe I. PODALYRIEAE. 



Stamens 10 or fewer : filaments monadelphous or dia- 

 delphous. 

 Leaves destitute of tendrils. 



Herbs, shrubs, trees, or woody vines. 



Fruit 2-valved or indehiscent, not a loment. 

 Anthers of 2 kinds : filaments monadelphous. 

 Anthers all alike : filaments diadelphous, at 



least beyond the middle. 

 Leaf-blades 3-5-foliolate. 

 Leaflets toothed. 

 Leaflets entire. 

 Leaf-blades pinnately several- to many- 



foliolate, or rarely 1-foliolate. 

 Fruit a loment. 

 Herbaceous vines. 

 Leaves bearing tendrils. 



TRIBE I. PODALYRIEAE. 



Herbs usually turning black in drying, the pods short, inflated or turgid. 



1. BAPTISIA. 



TRIBE II. GENISTEAE. 



Herbs with 1-foliolate or 5-11-foliolate leaf-blades : calyx-lips 



very unequal. 

 Pod turgid or inflated : lower calyx-lip prominently 3-lobed : 



leaf-blades 1-foliolate. 2. CROTALARIA. 



Pod flattened : lower calyx-lip obscurely 3-lobed : leaf- 

 blades 5-11-foliolate. 3. LUPINUS. 

 Shrubs with 1-3-foliolate leaf-blades : calyx-lips nearly equal. 4. CYTISUS. 



TRIBE III. TRIFOLIEAE. 



Pods curved or coiled : ovary curved, short-beaked. 5. MEDICAGO. 



Pods straight : ovary straight, long-beaked. 



Pods leathery : corolla free from the androecium, and 



deciduous. 6. MELILOTUS. 



Pods membranous : corolla adherent to the androecium, 



and persistent. 7. TRIFOLIUM. 



TRIBE IV. LOTEAE. 



Pods included in the calyx, the body broad, long-stipitate : 



filaments partially diadelphous, united to about the middle. 8. ANTHYLLIS. 



Pods exserted, not stipitate : 'filaments wholly diadelphous, 



one of them wholly distinct. 9. LOTUS. 



TRIBE V. GALEGEAE. 



Herbs : wings and keel-petals cohering. 10. CRACCA. 



Shrubs or trees : wings and keel-petals free. 11. ROBINIA. 



TRIBE VI. HEDYSAREAE. 



Calyx narrowed to a stipe-like base : corolla yellow : stamens 



monadelphous. 12. STYLOSANTHES. 



Calyx not narrowed to a stipe-like base : corolla white, blue, 

 purple, or violet : stamens diadelphous, or monadelphous 

 near the base. 

 Wings with short claws : leaflets stipellate : loments of 



several joints. 13. MEIBOMIA. 



Wings with long claws : leaflets not stipellate : loments 



of 1, or rarely of 2 joints. 14. LESPEDEZA. 



