R. P. Gregory 



313 



TABLE II. 



Matings of Normal Green 9 '■'• Variegated or Yelloiv-haved $ . 



Mating Fi 



Rosy-magenta* X 92711 28/12 24 plants. 

 Normal Green Yellow- All Green 



leaved 



ditto X ditto 29/12 17 plants. 



All Green 



ditto X 92«/ll 30/12 2 plants. 



i'ellow- All Green 



leaved 



Crimson King* x 92"/ll 159/12 27 plants. 



Normal Green Yellow- All Green 



leaved 



11/13 78 plants. All 

 Green; no Varie- 

 gated; no Yellow 



12/13 (not sown) 



j 106/13 114 plants. 

 All Green 



1 107/13 85 plants. 

 I All Green 



( 101/14 28 plants. 



j All Green 



-J 162/14 40 plants. 



All Green 



163/14 5 plants. 

 All Green 



* For a description of these races, see Journal of Genetics, Vol. i. p. 102. 



TABLE III. 



Matings of Variegated or Yellow-leaved 9 x Normal Green $ . 



Discussion of an hypothesis. 



1*116 work of Correns on Mirahilis^ ha,s given results of particular 

 interest, because of the relations which the form albomacidata has been 

 shewn to po.ssess, not only with the normal green type, but also with 

 the chlorina races. The form chlorina is distinguished from the normal 

 green type by the pale green colour of its leaves, which is due to the 

 relatively small amount of pigment developed in the chloroplasts. In 

 crosses between the normal gi-een and the chlorina form, the normal is 

 dominant to the chlorina character, and segregation takes place in the 



1 Zeitschr. f. Ind. Abst.- u. Vererbungslehre, i. p. 291, 1909; and 11. p. 331, 1909. 



