102 • TORREYA 



TABLE 2. The DEPEXDE^"CE for Activity upon the Positiox of Substituted Groups 



Inactive 



Inactive 



CHoCOOH 



6 



XO; 



Active 



CHoCOOH 

 O 



XHr 



Inactive 



CHoCOOH 

 O 



XOo 



Inactive 



CHoCOOH 



! 

 O 



NHo 



Active 



Active 



CHoCOOH 

 i 

 O 



Active 



CHoCOOH 

 I 

 O 



Active 



proximately five inches high, it was sprayed with a water solution containing 

 12.5 mg. of the chemical per liter of water. All new growth thereafter produced 

 modified organs. The change in the pattern of leaves can be seen by comparing 

 the three old leaves near the base of the stem which were nearly mature when 

 the plant was treated with those of the new growth. Also the flowers of the new 

 growth were modified as shown in figure 1 B and C. Stems and leaves some- 

 times became fasciated and flowers appeared to arise from leaves (Fig. 1 C). 

 Calyx tubes often remain closed and prevented the corolla from emerging. 

 The veins of the leaves often crowded toward the midrib making a narrow 

 leaf with only a ruffle of blade around the edge. The veins became nearly trans- 

 parent and the plants appeared to have a virus disease. 



Substituted benzoic acids. Considered from the standpoint of a plant growth j 

 substance, benzoic acid is an inactive compound. When, however, the nucleus 

 is substituted, the molecule may be activated. The degree of activity depends 

 upon the kind, number, and the position of substituted groups. Amino, nitro, 



