AGRICULTURAL BOTANY 



177 



is larger than the others, usually turned backward or 

 spreading; the two side petals, called the wings, are out- 

 side of the two lower petals, which are often joined to form 

 a keel. There are ten stamens, nine of which are united 



FIG. 89. Wild Parsnip. 



a, umbel; b, leaf; c, flower; d, section of fruit; e, petals; /, g, stamens; h, pistil; i, dia- 

 gram of flower. 



by their filaments, while the tenth is separate and free. 

 This condition is called diadelphous, that is, in two sets. 

 M. & H. AG. 12 



