EXPERIMENT STATION REPORT. 373 



, — Self-Fertilized. — , ^FLTtilized In the open.-, 



Type of Fruit. No. of No. of No. of No. of 



Cells. Seeds. Cells. Seeds. 



"Pear" (Long), 2 69 2 65 



2 45 2 gi 



2 64 2 79 



2 64 2 66 



2 96 



"Pear" (Large), 2 80 2 117 



2 92 2 84 



2 67 2 87 



2 31 



Long, oval, medium, 2 84 2 77 



2 57 2 80 



2 66 2 60 



2 81 2 79 



2 72 



2 59 



Long, oval, medium, 2 58 2 152 



2 95 2 145 



3 105 

 3 97 

 2 97 



Average of 45 fruits, '69 Average 30 fruits, 99 



Forty-five per cent, of the flowers covered with bags produced 

 fruits and these are upon ten different crosses, all of the small- 

 fruited sorts. The three crosses that gave no self-fertilized fruits 

 have many cells tO' a fruit, and this suggests that the fewer-celled 

 fruits are more readily self-fertilized, or in other words, the 

 nearer the fruits are tO' the wild state the more readily they are 

 self-fertilized. The table also shows that, as a rule, the self- 

 fertilized fruits produce less seeds than the cross-fertilized fruits. 

 Within the cross the size of each fruit showed no' correlation 

 with the number of seeds or between the number of seeds and the 

 number of cells. 



Datura Exclusion Experiment. 



Fifty flower buds of the various daturas were covered with 

 bags, but from these only fifteen capsules were found at the end 

 of the season, and the following table gives the seeds that these 

 bore, and, in the second column, are the results of the counting 

 of the seeds in an adequate number of similar capsules that were 

 not bagged : 



