238 
Christine E. Burgess. 
At the seventh node a change in anatomy occurred, the two 
bundles to the bud leaving the stem below the right lateral trace to 
the leaf. Also these bud bundles both passed out on the left side 
of the median trace, though springing from either side of the gap 
left by this leaf trace. 
F 
F 10 . XII. Diagrammatic Longitudinal Section through Nodes 15-17 of 
Abnormal Stem. A, stele. B, vascular supply to bud. C, median leaf trace. 
D, D', D", left lateral leaf traces to leaves 17, 18 and 19 respectively, d, d', 
right lateral leaf traces to leaves 17 and 18 respectively. E, commissure 
uniting vascular tissue of adjacent leaves and completing the tissue of the 
ridge. F, ridge bundle. L, U , vascular tissue of leaves 17 and 18 respectively. 
