400 



THE AMEBIC AN NATURALIST [Vol. XL VII 



served by me until October, too late in the season to self- 

 pollinate with the hope of obtaining seed. Open-polli- 

 nated seed was, however, collected from these two plants 

 and will be sown in the hope that this interesting sport 

 may be followed in later generations. 



The genealogy of the family from the F x hybrid 

 lO.SOLa, in so far as it refers to the production of dwarfs, 

 is presented in outline as follows : 



Culture 12.53, consisting of 48 

 plants, all true to the dwarf type 

 from etiolated rosettes as repre- 

 sented by 12.53a (Fig. 4). 



12.52a (Fig. 4). 



12.52ra (Fig. 4), an F 3 dwarf 

 from an etiolated rosette, repre- 

 sentative of 18 rosettes in this 

 F 3 generation of 259 plants. 



11.41c (Fig. 3), an F 2 hybrid 

 iv|-res.-'ntative of the mass of this 

 P, generation of 1,451 plants. 



10.30La, T 1 hybrid. 

 I 



grandiflora B X biennis A. 



2. F 3 Generations in the Family from the F x Hybrid 

 10.30L& 



The Fj hybrid designated 10.30L& was a sister plant to 

 10.30La and, therefore, also the product of the cross 

 g rand 'i flora B X biennis A. It has been described and 

 figured in the earlier paper (Davis, '11, pp. 213-216, Figs. 

 12, 13 and 14), and a brief account of its F 2 generation 



