374 



Tricot yloiis Races. 



cotyKjiis seedlings from conunercial seed of this pretty 

 little annual (Fig. 79). I cultivated them and saved 

 their seeds and in the following year planted out the 

 variants and the atavists separately. There were 37 of 

 the former group and 15 atavists. From the former 

 there arose 28 flattened stems and branches ; from the 



Fig-. 78. Tetragonia expansa. A, branch split by forking: 

 B, comb-bke expanded terminal flower of a flattened 

 main stem. 



latter only four, that is to say, a proportion of 75% and 

 27% respectively. It should be mentioned that all the 

 variants among the seedlings were planted out and that 

 some of these gave rise to rather weak plants, whilst of 

 the atavists I selected the strongest seedlings only. These, 

 however, in spite of their greater individual strength and 



