Variation and Heredity 295 
These two new forms, as well as the common O. lamarck- 
tana, were collected, and from these plants there have 
arisen the three groups or families of elementary species that 
De Vries has studied. In his garden other new forms also 
arose from those that had been brought under cultivation. 
The largest group and the most important one is that from 
the original O. Jamarckiana form. The accompanying table 
GENOTHERA LAMARCKIANA 
ELEMENTARY SPECIES 
7 
Generation | Gicas | ALBIDA ey - ~ eee es NanneLia | Lata Scr 
8 Gener. 
VIII} 1899 5 I ° 1700 21 I 
annual x 4 - 
7 Gener. 
VII; 1898 9 fo) 3000 II 
annual s v 2 
6 Gener. 
VI 1897 II 29 3 1800 9 5 I 
X a JS 
annual 
5 Gener. 
Vv 1896 25 135 20 8000 49 142 6 
annual . v a 
4 Gener. : 
IV 1895 I 15 176 8 14000 60 73 I 
annual ‘ Yv sd 
3 Gener. 
III {1890-91 I 10000 3 3 
biennial s 4 
2 Gener. 
II {1888-89 15000 5 5 
biennial \~———, 
1 Gener. 
I 1886-87 9 
biennial 
