July 15, 191 5 - Heredity of Color in Phlox Drummondii 299 



are put in one class and the white-eyed ones (e) in another class, the 



results will be as follows : 



E e 



Observed 373 170 



Calculated '. 407. 2 135. 8 



A slight discrepancy occurs because the whites fall into two classes, 

 some supposed to have E and others e. The total number of whites are 

 split up into classes arbitrarily for the calculation. The same w^as done 

 in a few other cases. 



Similarly, if the other dominants and recessives are brought together, 



the results are the following: 



E e B b R r I 



Observed 373 170 404 139 442 loi 399 



Calculated 407. 2 135. 8 407. 2 135. 8 407. 2 135. 8 407. 2 



i Dominants. Recessives. • 



. ,, [144 404- 5 138- 5 



Average of all |^^^ g ^^^^ ^3^8 



SERIES II 



Pollen parent. — The same variety, Camea, which was used as pollen 

 parent in Series I and III. 



Seed parent. — A bluish lilac variety known in commerce as 

 Coccinea. This is a dark-eyed variety, the center of the flower being 

 more dense than the remainder of the flower, but without any color 

 pattern (PI. D). 



Table II. — Color of the progeny of hio varieties of Phlox drummondii, the Coccinea and 



the Camea 



Parent or progeny. 



Phenotypic 

 formula. 



Phenotype. 



Field 

 count. 



Calcu- 

 lated. 



Ratio. 



Seed parent: Phlox drum- 

 mondii, var. Coccinea. 

 Pollen parent: Phlox drum- 

 mondii. var. Carnea. 



Fi generation 



F2 generation: 

 Alternative factors — 



'"[ 



Total . 



EBr 



eBr 



EeBbRr. 



EEBBRR. 

 EEBBrr... 



EEbbRR. 

 EEbbrr... 



eeBBRR. 

 eeBBrr... 



Bluish lilac (138-1), dark 



eye. 

 Pale rosy pink (129-1), white 



eye. 

 Carmine purple (156-2), dark 



eye. 



Crimson carmine (1S9-3), dark 



eye (PI. D, fig. A). 

 Bluish lilac (183-1), dark eye 



(PI. D, B). 



Rosy white (8-1), dark eye 



(PI. D, fig. C). 

 White, dark (pink) eye (PI. 



D, fis. D). 



Rosy magenta (169-1), wh-'te 



eye (PI. D. fig. E). 

 (Perhaps some of the whites 



come in this class). 



Bricht rose( 128-3), white eye 

 (PI. D, fig. F). 



eebbRR. , 



cebbrr I White{||^^^7}(Pl. D, fig. (7) . 



(") 



48.52 

 16. 17 



16. 17 

 5-39 



16. 17 

 (°) 



(o) 



" See below. 



