RAISING NEW SWEET PEAS 61 



varieties unfixed in their natures one is obviously dealing with 

 characters quite outside the scope of Mendel's laws, and there is no 

 limit, at least in the first generation, to the diversity of colours so to 

 be obtained. The whole cause of confusion between scientists and 

 horticulturists is that the former in following in Mendel's footsteps 

 select characters which are at once single and constant, and deal 

 only with pairs of characters which are of antagonistic qualities 

 whilst horticulturists, regardless of these rules, cross qualities which 

 do not find an opponent in the other parent. 



