PLANT BACTERIA, VOL. 2. PLATE 7. 
Crown Gall on Daisy. 
Two tumors on the stem of a Paris daisy as the result of an inoculation of Bact. tumefaciens by needle-pricks, and ona 
branch above the upper one a secondary tumor on the petiole of aleaf. Age of primary tumors about three months; 
that on the leaf is much younger, perhaps four weeks old. 
