striped Flowers 339 



count of their stiff and erect appearance, 

 and they are marked by more divergent horns 

 crowning the pods. They are said to produce 

 only a relatively small number of doubles from 

 their seeds, and even this small number might 

 be due to fertilization with pollen of their 

 neighbors. I saw some of these reversionary 

 types, when inspecting the nurseries of Erfurt, 

 but as they are, as a rule, thrown out before 

 ripening their seed, nothing is exactly known 

 about their real hereditary qualities. 



Much remains to be cleared up, but it seems 

 that one of the best means to find a way through 

 the bewildering maze of the cultures of inherit- 

 ance, is to make groups of related forms and to 

 draw conclusions from a comparison of the 

 members of such groups. Such comparisons 

 must obviously give rise to questions, which in 

 their turn will directly lead to experimental in- 

 vestigation. 



