412 Origin of Each Species Considered Separately. 



The fruits are short and thick and contain Httle seed. 

 They attain scarcely half the length of those of O. La- 

 mar ckiana but are almost as stout as these. 



I first observed the above mentioned deviations from 

 the type of O. Lamarckiana in 1887 on the very first 

 mutants, as far as they could be discovered without mi- 



// / 



Fig. 92. Oenothera lata. Rosette with radical leaves. 

 Aged about 3 months. 



croscopical investigation ; and since then I have observed 

 them every year not only in the new mutants but also 

 in their progeny. 



Like O. Lamarckiana, 0. lata is both annual and bi- 

 ennial. But I grow it as an annual by preference. The 

 first two leaves which appear after the cotyledons plainly 



