Oenothera Nanella. 375 



rents being fully developed; but only in a single indi- 

 vidual. 



Beside nanella-lata I have observed the following 

 combinations : 



COMPOUND TYPES OF OENOTHERA NANELLA. 

 FROM SEEDS OF COMBINATION 



O. Lamarckiana X O. nanella O. 7ianella-oblonga 1898 



O. lata X O. nanella O. nanella-albida 1899 



" " " " O. nanella-ellipHca 1899 



" " " " O. 7ia7iella-sciniillans 1899 



O. nanella O. nanella-oblonga 1897 



O. scintillans O. scintillans-nanella 1899 



O. gigas O. gigas-nanella 1897 



O. Lamarckiana O. nanella-ellipiica 1889 



This list is sufficient to show that the dwarf-character 

 can be associated with the characters of the various other 

 new species. The characters of these others may also be 

 associated with one another although this is very rarely 

 the case. This difference between 0. nanella and other 

 species is doubtless intimately connected with the varietal, 

 as opposed to specific, character of 0. nanella ^vhich 

 marks it off from all the other new species. 



If we regard nanella as a variety we should expect it 

 to arise from any of the new species just as much as from 

 O. Lamarckiana itself. And it should be noted in this 

 connection that, of the 6 combinations mentioned, only 

 one arose from the seeds of nanella. 



I shall now give a description of the flow^ers of the 

 dw^arf (Fig. 77, p. 361). 



These are remarkably large compared with the size 

 of the plants, especially in the case of vigorous biennial 

 individuals. On the latter they attained to very nearly 

 the size of the flowers of O. Lamarckiana. On plants 

 which flower in the first year they are usually much 



