154 



On the Reproductive Functional 



[No. 3, 







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By calcu- 











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lation. 









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Table 2. Contcl.— Pure and Mixed 

 Unions of Verbascum jphceniceiim 



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comparative 

 fertility of 



and var. as $ 



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the different 

 unions. 







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No. 





















2. 



V. phoeniceum, rosea, by- 

















. 





pollen of V, phceniceum L., 



12 



9 



306 



34 



20 



680 





957.7 



3. 



V. phmniceum, ■ alba, by 

 pollen of V. phveniceum, 





















rosea, 



7 



5 



154 



31 



20 



616 





867.6 



4. 



V. phoeniceum, alba by pollen 





















of V. phoeniceum, 



16 



11 



287 



26 



20 



522 



.. 



735.2 



5 



V. phoeniceum, by pollen of 





















V. phoeniceum, rosea, 



10 



8 



193 



24 



20 



483 



, , 



680.3 



6. 



V. phoeniceum by pollen of 

















. 





V. phoeniceum, alba, 



10 



6 



120 



20 



20 



400 



.. 



563.4 



7. 



V. phoeniceum by pollen of 

















. 





V. ferrugineum, Andr., 



12 



7 



148 



21 



20 



423 



., 



595.8 



8. 



V. phoeniceum by pollen of 

















. 





V. blattaria, lutea L., 



12 



7 



112 



16 



20 



320 



. , 



450.7 



9. 



V. phoeniceum by pollen of 





















V. blattaria, alba, 



12 



4 



54 



13 



20 



270 



# , 



380.2 



10. 



V. phoeniceum by pollen of 

















. 





V. lychnitis lutea, L., 



12 



8 



102 



13 



20 



255 



, . 



359.1 



11. 



V. phoeniceum by pollen of 

















. 





V. ovalifolium, ... 



12 



5 



43 



8 



20 



172 



•• 



242.2 



In addition to the simple and calculated results given on Table 1, 

 I have, in the above, given at the right hand, for the sake of compari- 

 son, the calculated product from an assumed 1,000 seeds of the pure 

 unions relatively to those yielded by the cross and hybrid unions. 

 By a further comparative study of these results, we find that the 

 fertility of the pure unions of V. phoeniceum, relatively to that of its 

 cross-unions with the white and rose-coloured varieties, is, in the 

 least differentiated or most highly fertile unions, viz., V. phoeniceum, 

 rosea by pollen of V. phoeniceum, as 100 : 95; whereas in the 

 least fertile unions, V. phoeniceum by pollen of V. phoeniceum, alba, 

 the proportions are as 100 : 56. The average fertility of the five 

 cross-unions given in the table, relatively to the pure unions given in 

 the first line, is as 100 : 75 ; so that the pure unions thus exceed in 

 fertility the cross-unions, in nearly the proportions of 4 : 3. Again 



