120 BOTANICAL GAZETTE [AUGUST 
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. 
G T tl terminal bud of P. Betton showing 
course of bundles; sections follow those of 7a 2-6; 168. 
The node in which the strands have become differentiated 
presents a most complicated appearance. One often finds for 
