114 



ELEMENTS OF BOTANY. 



61. PAPILIONACEiE. PEA FAMILY. 



Trees, shrubs, herbs or woody vines ; leaves alternate, 

 stipulate, mostly compound; flowers irregular, usually per- 

 fect, solitary or variously clustered ; calyx 4-5-cleft or lobed, 

 sometimes 2-lipped ; petals 5, the upper and outer one (the 

 standard) usually longer than the others and enclosing them, 

 the two lateral (the ivings) usually spreading, and the two 

 lower (the keel) folded together and often united; stamens 

 mostly 10, monadelphous or diadelphous, rarely distinct ; 

 corolla and stamens inserted in the base of the calyx ; pistil 

 1, ovary 1-celled or sometimes 2-celled by the inwardly pro- 

 jecting suture, and sometimes transversely several-celled ; 

 fruit a legume, 1-many-seeded. 



Leaves trifoliate. 



Legume several-seeded. 

 Plants erect. 

 Legume inflated 

 Legume nodulose . 

 Legume separating into joints 



Plants twining or trailing. 

 Keel spirally tv^^isted. 

 Inflorescence racemose 

 Inflorescence capitate 



Keel not twisted. 



Calyx 5-toothed. 

 Standard spurred 

 Standard not spurred 



Calyx 4-toothed . 



Legume 1-few-seeded. 



Leaflets serrate or denticulate. 

 Legume coiled . 

 Legume not coiled. 

 Flowers racemed 

 Flowers capitate 



I. Baptisia. 

 XXVIII. Erythrina. 

 XVII. Meibomia. 



XXVI. Phaseolus. 

 XXVII. Strophostyles. 



XXL Bradburya. 

 XXII. Clitoria. 

 XXIV. Galactia. 



IV. Medicago. 



V. Melilotus. 

 VL'Trifolium. 



