456 LEVINE: CROWN GALL ON BRYOPHYLLUM 
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Explanation of plate 10 
-I. Attached leaf of Bryophyllum calycinum inoculated with 
Bacterium tumefaciens showing crown gall and bud development similar 
to the axillary leafy crown gall resulting from the inoculation of an axillary bud. 
Fic. 2. The leafy crown gall shown in Fic. 1 after growing in soil for 
two months. 
Fic, 3. Globular crown gall at a. Differentiated crown gall showing 
small leaves growing out of crown gall at b. 
Fic. 4. Young uninoculated B. calycinum plant showing developed 
marginal notches. 
