No. 443.] 



MUTATION IN PLANTS. 



757 



deVries also states that (E. biennis and Ui. umricata are found 

 in Holland, notably on the dunes. 



It seems well established that a large flowered CEnothera was 

 seen in the Altdorf Garden in 1635, which is probably referable 

 to none other than lauiarckiana. Later notes of its occurrence 

 are in existence, but the first definite record of the species was 



Fig. 5. — CEnotlura riibriiiervis. Adult rosette immediately preceding the development of the flowering stem. 

 Photograph of living plant taken from directly above. (See Kigs. 4 and 6.) 



in 1788. It has been found constant since this date, both in 

 gardens and when running wild : its evolutionary procedure is 

 therefore none the less valuable as scientific evidence than as if 

 it were an indigenous wild growing species. 



CEnothera lauiarckiana is a species which, so far as present 



