Oenothera Ohlonga. 341 



INDIVIDUALS OF OENOTHERA OBLONGA WHICH HAVE 



ARISEN BY MUTATION. 



II 



FROM CROSSES. 



SOURCE 



O. Lamarckiana X O nanella 

 O. Lamarckiana X O. brevistyli 

 O. lata X O. nanella .. . . 

 O. lata X O. brevistylis ■. . 

 O. lata X O. laevi folia . . 

 O. rubri7iervis X O. nanella- 

 O. scintillans X O. nanella , 

 O. Lafnarckiana X O. bietmis 

 O. Lamarckiana X O. suaveolens 



To obtain the above figures I have sometimes re- 

 corded the seedhngs when they had from 6 to 8 leaves 

 but at other times later, according to the different years 

 and various other circumstances. In many cases I have 

 transplanted them in order to observe them during the 

 whole summer. Fig. 72 gives an idea of the stage at 

 which the seedlings were recorded, and may be com- 

 pared with the parallel figures for the /a^a-families (Plate 

 IV and Fig. 48, p. 280). We are concerned in Fig. 72 

 with a culture of O. Lamarckiana which was sown on the 

 14th of March 1900 and transplanted into wooden boxes 

 on the 14th of April. The seeds had been harvested in 

 1895 from three plants enclosed in parchment bags to 

 insure pure self-fertilization. Of the 188 seedlings raised, 

 4 were mutations of which two were albida and two ob- 

 longa. By a lucky chance an example of each of the 

 new forms stood quite close together; so that I was able 

 to include them in the same photograph (Fig. 72). The 



