ANTHOCYANINS AND GENETICS 157 



Pisum sativum (Common Pea), Bateson (487), Lock (512, 518), Tschermak (479, 



494, 590). 



Polemonium (Jacob's Ladder), Correns (486), de Vries (498). 

 Primula sinensis (Chinese Primrose), Gregory (557, 607), Keeble (582), Keeble 



& Pellew (541). 



Reseda (Mignonette), Compton (569). 

 Salvia Horminum, Saunders (487). 

 Senecio vulgaris (Groundsel), Trow (589). 

 Silene Armeria (Lobel's Catchfly), de Vries (474, 498). 

 Solatium nigrum, de Vries (474). 



S. tuberosum (Potato), East (538), Salaman (544, 585). 

 Trifolium (Clover), Kajanus (579). 

 Tropaeolutn (Nasturtium), Weiss (534). 

 Veronica longifolia, de Vries (474, 498). 

 Viola cornuta, de Vries (474, 498). 

 Zea Mays (Maize), Burtt-Davy (568), Correns (476), East (570), East & Hayes 



(553), Emerson (554, 571, 605, 629), Lock (493, 504, 583). 



Agrostemma Githago. Pigmented type dominant to albino. De 

 Vries (474, 498). 



Amaranthus caudatus. Red-leaved type dominant to green-leaved 

 variety. De Vries (498). 



Anagallis arvensis. Weiss (566) crossed the scarlet-flowered type 

 with the blue-flowered variety and obtained the red type in F x . In F 2 

 there was segregation into red and blue in the proportion 3:1. Hence 

 the blue arises from the red by the loss of a single dominant factor. 



Heribert-Nilsson (576) crossed a variety which had pink, almost 

 white, flowers, which bred true, with the red type. F r was red like 

 the type. In F 2 there was segregation into red and pink in the propor- 

 tion 3 : 1. 



Antirrhinum majus. De Vries (565) made the first experiments on 

 this species using the following varieties: 



Rot tube and lips of the corolla red, the lips deeper. 



Fleischfarbig tube and lips pale red. 



Delila tube pale or white, lips fairly deep red. 



Weiss white, often with a distinct very pale red tinge. 



De Vries regarded red as made up of fleischfarbig, F. and delila, D, 

 two dominant characters, and white as carrying two characters, w and 

 w', recessive to F and D respectively. Then F x from red x white 

 would be FDww', and F 2 would give red, flesh, delila and white in the 

 proportion 9:3:3:1, which de Vries maintains agrees with his experi- 

 mental results. Various F x reds, delilas, and flesh colours were selfed, 

 and the F 2 was in accordance with the above scheme. 



