134 Atavism. 
a bag, fertilized each flower with its own pollen, 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 July. On each bed one saw at a glance that about 
half the plants bore exclusively red whereas the other, 
slightly larger half, bore striped flowers. I recorded the 
numbers separately for the ten groups ; but do not con- 
sider it necessary to give the separate numbers. There 
flowered : 
From the seeds of: Plants Reds Average 
1. Red flowers 67 33 %} 
2. Striped flowers 137 46% f 
* * * 
The result of all the experiments described above may 
be summarized in the following theses : 
1. Antirrhinum inajiis Intcnm rubro-striatum (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 by a gulf from the 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 individuals 
produce many more reds ; the mean of three experiments 
(11-36-42) 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 
