BOTANICAL GAZETTE 



node may join the peripheral bundles at that node. The periph- 

 eral bundles of any internode, therefore, when young will con- 

 sist of one set of foliar bundles only; and when older may contain 

 portions of the foliar bundles of the leaves of 3 nodes. 



Fig. 7-10. — Transverse sections through a terminal bud of P. mcthyslicum showing 

 course of bundles; sections follow those of figs. 2-6; X168. 



The node in which the strands have become differentiated 

 presents a most complicated appearance. One often finds for 



