PLATE 28 
i» 2, 3, 4.—Plant 4 of Ricinus communis , injected August 15, 1916, with 1 to 
1,200 ammonia water. Various portions of injected intemodes all the proliferations . 
of which are from the inner pith. In figure 1 there is a continuous sheet of granula¬ 
tions bearing nodules and strands. 
Figure 3 is a ceiling. Photographed on September 11, 1916. X2. 
