Evers porting Varieties with Heritable Pasciation. 513 



Geranium molle faseiatmn in the next section. Of this 

 race, one-third consists, as a rule, of inthviduals with 

 fasciated hranches. In 1895 I was growing its sixth 

 generation. I have also cultivated six generations of 

 Taraxacum officinale fasciatuin. This species, as a rule, 

 produces 30%, and sometimes more, of fasciated individ- 

 uals. Beautiful instances of fasciation have been fur- 

 nished almost every year, since 1885, by Tetragonia ex- 

 pansa in the botanical garden in ^Amsterdam, and the 

 proportion of these was, in the fourth and fifth genera- 

 tions after isolation, slightly over 50%. 



The same general behavior w^as observed in my fas- 

 ciated races of Thrincia hirta, Veronica longifolia, Hes- 

 peris matronalis, Picris hieracioides etc. 



From these data wx may draw the general conclu- 

 sion that such races, after having been isolated and sub- 

 jected to good treatment, and by the selection of the 

 finest instances of fasciations as seed-parents, consist of 

 a little less than one-half of fasciated individuals, and of 

 a little more of apparently normal, atavistic, plants. This 

 proportion, however, depends to a large extent on ex- 

 ternal conditions. By means of suita])le cultivation it 

 can be considerably increased, but on cessation of this 

 care it soon sinks to quite low values. 



Many of the known instances of fasciations probably 

 behave in the same way. For instance Kornicke has 

 grown for many years a perfectly constant race of a 

 fasciated pea (Pisum safiT'iun) in Poppelsdorf. and Rnr- 

 PAU has informed me that he cultivated this fasciated 

 race from seeds during several years in good garden soil 

 and found it constant. The result of sowing the seed 

 of Sedum reflexum cristatuiu (Vol. T, p. 183), in this 

 garden, was the reappearance of the abnormality in large 



