82 De Vries: Atavistic Variation in Oenothera 



I give, above, the description of my whole race in the form of a 

 pedigree, omitting the sectorial and bud-variations, again remind- 

 ing the reader that in every case the seed-bearing plants were 

 fertilized only with their own pollen after enclosure in bags of pre-, 

 pared parchment-paper. 



Though the figures of this experiment are but small, they seem, 

 to be sufficient to prove the presence of a very curious case of 

 variability, the alternation between the typical cruciate flowers of 

 the species and the atavistic petals of the group to which the 

 species belongs, and to justify the provisional name chosen for my 

 race : Oenothera or Onagra cruciata varia. 



Amsterdam. 



