1922] 



Setchell-Goodspeed-Clausen: Nicotiana Tabacum 



501 



pink of the pink flowering derivative was at first considered somewhat 

 darker in shade than the light pink of virginica, but this line also 

 showed the hose-in-hose flower character, which sometimes makes it 

 difficult to determine flower color accurately. In later generations of 

 this line its color was noted as equivalent to the light pink of virginica. 



TABLE 13 



Fa BEHAVIOR OF HOSE-IN-HOSE SEGREGANTS. 



* Apparently not so extreme as calycina. 



TABLE 14 

 Fs BEHAVIOR OF NORMAL SEGREGANTS. 



Taking up corolla form next, we may deal with the different popu- 

 lations in the same manner as was done in the case of flower color. 

 F3 populations from F^ hose-in-hose segregants are recorded in table 

 13. Seven populations were grown, all of which bred true to the 

 hose-in-hose character, although curiously enough two ])opulations, 

 12F;jn,sP2-P._,^ "J'<1 12F,.,HisP49Pio did not appear to exliibit so ex- 

 treme character expressions as calycina. 



Only one partially hose-in-hose plant was grown in F.,. For the 

 sake of economy of space it is included in table 14, where it is marked 



