134 Atavism. 



a bag, fertilized each flower with its own ixjlleii, and 

 gathered the seeds separately. Five fruits of each color 

 ripened, though some of them contained little seed. I 

 sowed the seed in 1899 on ten separate beds; they flow- 

 ered in Jul}'. On each bed one saw at a glance that about 

 half the plants bore exclusively red whereas the other, 

 slightly larger half, bore striped tiowers. I recorded the 

 numbers separately for the ten groups ; but do not con- 

 sider it necessary to give the separate numbers. There 

 flowered : 



Average 



42% 



The result of all the experiments described above may 

 be summarized in the following theses: 



\. Antirrhiniiiii inajus lutciun nibro-striahiiii (Plate I) 

 is an inconstant race consisting of striped and of red 

 flowered plants. 



2. The striping of the commercial race varies con- 

 tinuously, but the continuity does not include the red 

 ones; these are separated bv a gulf from tlie striped 

 (Fig. 22). 



3. The intensity of inheritance of the finely striped 

 plants is about 95-98%. They pass into the red type 

 either when propagated by seeds or by buds. 



4. In the same way the broadly striped indixiduals 

 produce many more reds; the mean of three experiments 

 fl 1-36-42) was about 30%. 



5. The red plants resemble the wild ancestral form 

 externally but are not constant as this is. The intensity 

 of inheritance of their character is only about 70-85% ; 

 and the remainder of their offspring revert to the striped 



