Fig. 24. Part of a Transverse Section of Marrow Stem, including one of the Vascular 

 Bundles. A, epidermis ; B, collenchyma (at sides) and parenchyma (in middle) 

 of the cortex; C, endodermis ; D, sclerenchyma ; E, parenchyma (intra-stelar) ; 

 F, outer phloem ; G, cambium ; II, xylem ; J, inner phloem (note the cambium 

 between this and the protoxylem). 



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