EXPERIMENT STATION REPORT. 



261 



While the number of instances in this test is too small for 

 any generalization, it suggests that the size and weight of the 

 plant do not govern the size and number of fruits or that the 

 weight of any fruit is correlated with number within the same 

 variety ; but on the contrary, the average size of a mature fruit is 

 quite near to a fixed weight — in this instance approximating 

 1000 fframs. 



Notes Upon the Rays of the Russian Sunflower. 



Seeds from a commercial packet of the Russian Sunflower 

 (Heliantlms annuiis L.) were planted in some vacant hills among 

 various crops upon (i) comparatively rich soil and (2) poor 

 soil, the point being to note any difference that might obtain in 

 the number of ray flowers. There were seventy-eight plants, 

 forty-one in rich (garden) soil and thirty-seven in poor (farm) 

 soil. 



The number of rays ranged from 17 to 42 and it is noted 

 that in the rich soil, the heads (plants) with 34 rays were the 

 most numerous (6), while with those in poor soil the prevail- 

 ing number (6) was 21. There were no plants with above 36 

 rays upon the poor soil, and none below 21 upon the rich soil. 



