388 Origin of Each Species Considered Separately. 



were transplanted, under glass at first, in order to give 

 them plenty of room for the full development of the 

 rosette. The rosettes were counted between the ages 

 of 2 and 3 months, the process lasting from the middle 

 of May till the middle of June (see Fig. 82). Alto- 

 gether about 5850 rosettes produced by 42 plants were 

 recorded. The crops which contained less than 50 seed- 

 lings from a given parent were recorded but not included 

 in those from which the following percentages were 

 counted. The average number of seedlings per parent 

 plant in the cases dealt with is therefore about 140. 



The number of scintillans naturally varied from crop 

 to crop, as a result, doubtless, of the smallness of the 

 number of seedlings counted. I have determined the 

 percentage values for each parent, and arranged them 

 in groups of 1-10 %, 10-20 % and so on. I found: 



This gives an average of 40 %, a figure which agrees 

 with the coefficient for the grandmother (36 %) closely 

 enough. 



The oblongas in this experiment varied between 0-12 

 per seed parent. There were 197 of them altogether, 

 i. e., they formed about 3 % of the population. The rest 

 were, with the exception of about 1 % O. lata and O. 

 nanella, all O. Lamarckiana. We have therefore on the 

 average : 



