The Laevifolia-Family. 



171 



OENOTHERA LAAIARCKIANA. 



B 



THE LAEVIFOLIA-FAMTLY. 



TABLE EXHIBITING THE ORIGIN OF NEW SPECIES FROM 



O. LAEVIFOLIA. 



(The figures refer to the number of individuals.) 



GENKRATIONS 



O. 

 laevi- 

 folia 



MUTANTS 



lata 



ellip- 

 tica 



na- ! rubri- 

 nella inervis 



spa- 

 thu- 

 lata 



lepto- 

 carpa 



O. La- 



mar- 



ckia- 



na 



IX 



9th generation 

 1895 



8th generation 

 1894 



VIII ; 



VIII; 1894 



1 



7th generation 



VII 



1893 



i6th generation 



Vll 1892 



5th generation 



V! 1891 



IV 



III 



U 



1 



4th generation 

 1890 



3rd generation 



1889 



2nd generation 

 1888 



1st generation 



Hilversum 



1886-1887 



(biennial) 



1500 2 1 



53 



I 

 25 



8 



2 



12 



44 



i 

 96 



400 



N. B. The numbers composing the generations marked with a 

 were not counted. 



