Oenothera Rubrmervis. 



331 



ber of seedlings will be seen to be much greater than in 

 the first table. It amounts here to about 6 per thousand. 

 But it must be mentioned that only those cases are in- 



INDIVIDUALS OF OENOTHERA RUBRINERVIS WHICH HAVE 



ARISEN BY MUTATION. 

 I 



SOURCE YEAR 



^ T u- S 1890, 1895 ) 



(J. I^amarcKtana . . . . -j loqc; icqy r 



A branch of the same family 1895, 1896 



O. laevifolia 1889, 1894 



O.lata 1900 



O, oblonga 1897 



O. Laniarckiana X O. nanella 1897 

 O. lata X O. naftella . . . 1895, 1900 

 O. Lamarckiana from the field 1889 



SEEDLINGS 

 TOTAL RUBRINERVIS 



Total 54 



INDIVIDUALS OF OENOTHERA RUBRINERVIS WHICH HAVE 



ARISEN BY MUTATION. 

 II 



SOURCE 



O, Lamarckiana, a biennial culture 

 O. lata which mutated from O 



Lam., first generation . 

 O. lata X O. Lamarckiana 

 O. lata X O. brevistylis . 

 O. nanella X O. brevistylis 

 O. scintillans X O. nanella 

 O. Laynarckiana arisen from the 



cross O. Lam. X O. scintillans 



eluded in which the species in question actually occurred 

 and that a figure which properly represents the proportion 

 of 0. rubrinerz'is cannot be obtained without including 



