C. W. Richardson 177 



Fig. 4 represents an effort of a sterile female to produce a fruit 

 without setting a single seed, though it has been thoroughly polli- 

 nated \ The actual cross here is vesca x Laxton's Bedford Champion. 



^ 



Fig. 4. 



A few plants of this cross have set a few seeds when pollinated with 

 either parent ; of the two The Champion seems the more successful 

 sire; at present these cross-backs are too young to draw conclusions 

 from. 



The cross pink-flowering vesca x tohite vesca produced pink F^'s. I 

 have F^ plants which should flower next spring. The cross double x 

 single flowering vesca produced plants with single flowers and occasion- 

 ally flowers with a few extra petals in F^. My F^'s should flower next 

 season. The thick rubbery leaves of chiloensis have appeared in all -F/s 

 I have obtained from this species crossed with others, though the leaves 

 are larger than those of the norvtiSiX chiloensis ; some F^^ of my chiloensis 

 crosses should be old enough next year to show to some extent how far 

 leaf characters can be segregated. Some multifoliate plants when selfed 

 have given a majority of multifoliate plants. My actual numbers were 

 too small to base conclusions on. On the whole, I expect, judging by 

 results I have already obtained, that most characters possessed by 

 Fragaria are capable of segregation, but at the same time some linked 

 characters may present difficulties which it may take years to solve. 



For plants of F. virginiana from a wild source I am indebted to 

 Dr W. A. Orton of the Department of Agriculture, Washington, and 

 Professor Czapek of Prag very kindly sent plants of F. elatior which I 

 am also using. 



1 Knight mentions a seedling Hautbois x Alpine in which the fruit developed 

 though no seed was formed. Tr. Hort. Soc. v. 294. 



