430 



BROOKLYN BOTANIC GARDEN MEMOIRS 



cases of monomery with respect to this character, as indicated by 

 the occurrence of monohybrid ratios in the F2 from crosses between 

 plants respectively having and lacking the characteristic "5"-lobing. 



Table i 



Composition of F^ Families which Show Monohybrid Ratios, from Crosses Involving 



the Presence of the B Factor in Wild Biotypes of Shepherd's Purse 



