BORK. 189 
The bork of our foliage trees, for example of the oak, con- 
tains, in addition to cork-cells, all the elements of the outer 
bark (parenchyma, stone-cells). 
Fic. 99.—Transverse section through an older internode of Juniperus communis L.; 
p, outer layer of the primary bark, with a resin canal; &, interior cork (J. Moeller). 
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Fic. 100.—Bork of Cortex Sassafras radicis; aa, decayed surface; ss, cork-bands ; 
bb, phloém; 0, oil cells; r, medullary rays. 
