8 
Research Bulletin No. 4 
form red color. On the other hand, the red individuals are constant in 
71-84 per cent, of their offspring, while 16-29 per cent, go over to the 
striped type. Or in one word : both types are inherited to a high degree, 
but the striped type is more strictly inherited than the red one. 
De Vries's results were in some respects very similar 
to those of Correns and it is probable that he would have 
interpreted them in the same way had he then been famil- 
iar with Mendelian phenomena. 
Variegated 
plant 
I 
Variegated 
branch 
Green 
branch 
I 
Variegated 
plants 
100-a* 
Vgtd. 
100-a 
I 
Green 
a 
Vgtd. Green >66 <33 
branch branch 
V G V G V G G 
>66 
Green 
plants 
a 
I 
Vgtd. 
25 
<33 
I 
i 
Variegated 
plants 
25 
rh 
66 33 
Green Green Vgtd. 
75 100 100-a 
Green 
a 
I 
i 1 
>66 <33 
GV G G G 
G V G G 
Vgtd. 
25 
Green 
plants 
75 
1 
I 
33 
Green Green 
75 100 
66 33 
rn m I 
V G V G G G 
F 3 100-a a 25 75 25 75 100 100-a a 25 75 100 100 100-a a 25 75 100 100-a a 25 75 100 100 
Fig. 2. 
Correns's Diagram Showing the Inheritance of Variegation and 
Self-green in the Leaves of Hiraliilis jalapa. 
Correns 3 has reported results of a careful study of the 
inheritance of the self-green condition appearing as a 
bud-sport on variegated-leaved plants of Mirabilis jalapa, 
and also of a self-color appearing in striped-flowered 
plants of the same species. His results for self-green 
and variegation of the leaves are shown diagrammatically 
in Fig. 2. The results are stated in approximate per- 
3 Correns, C, Ber. Deutscli. Bot. Gesel, 28: 418-434, 1910. Ber Uber- 
gang aus dem hcmozygolischen in einen heterozygotischen Zustand im selben 
Individuum bei buntblattrigen und gestreiftbluhenden Mirabilis- Sipp en. 
* Numerals indicate approximate percentages; a =0-10 per cent. 
