Mutations in Nature. 305 



The foregoing account may be summarized in the 

 following list. 



SUMMARY OF NEW SPECIES FOUND AT HILVERSUM. 



PLANTS FROM SEED 



O. lata 1889, 1894 O. lata 1887, 1889 



O. nanella 1894 O. naiiella 1889 



O. spathulata 1886, 1894 O. laia-nanella 1889 



O. elliptica 1886 O. rubrinervis 1889 



This list contains just those forms which are the 

 most easily recognizable and appeared oftenest in my cul- 

 tures. Of the rest the only one which has occurred in 

 my garden up to the year 1894, (the last year in the above 

 list), was 0. scintillans and this only in one specimen. 



These forms therefore clearly originated in the field 

 and not in my cultures. Moreover they arose there in 

 the same way as in my experimental garden, without 

 transitional stages, from the seeds of normal Larnarc- 

 kiana, and year after year. 



These observations do not pretend to be complete 

 but they suffice to demonstrate the identity of the pro- 

 cesses in the field and in the garden. The cultures are 

 merely a more convenient and certain method of dis- 

 covering what happens in nature. 



Whether O. scintillans and the other species which 

 were only observed in my garden also appeared from 

 time to time in the field at Hilversum, I do not, of course, 

 know. But I regard it as extremely probable that they 

 did. Several of them appeared so rarely in my garden 

 that it did not seem worth while to try to get them again 

 by carrying out more extensive sowings. Still less did 

 it seem likely that I could get them by sowing seed col- 

 lected in the open. 



