284 



The Pedigree Families. 



Plate IV and grew in the same box quite close to the 

 group that was photographed. 



The 1900 crop contained, besides the mutants figured, 



a great many others partly 

 of the same species and 

 partly of others. The lat- 

 ter were three O. fianella, 

 one O. elliptic a and one 

 O. sublinearis. This lat- 

 ter, which is one of my 

 rarest species, I photo- 

 graphed, like the others 

 referred to above, whilst 

 it was flowering in xA.u- 

 gust. I shall give the fig- 

 ure of it when I come to 

 describe the species later 

 on (see Fig. 85). 



In previous genera- 

 tions this family was very 

 poor in mutations, for the 

 simple reason that it was 

 cultivated on a small scale. 

 One year (1898) there 

 arose in it, one example 

 of 0. scintillans and an- 

 other year an entirely new 

 form 0. semilata. This 

 looks very much like 0. 

 lata but is much more ro- 

 bust and bears plenty of pollen. It is one of my rarest 

 new species, arising, as it did. only twice altogether. 

 On page 285 I give the genealogy of this whole fam- 



Fig. 50. Oenothera ohlonga. An ex- 

 ample which arose by mutation 

 from the same parentage as the 

 plant shown in Fig. 49. 



