4 A NEW ZEALAND NATURALIST'S CALENDAR. 



good pocket-lens, it will be found that the tissues consist 

 of numerous wedge-shaped bundles of tubes radiating from 

 a small central portion of pith, and separated from each 

 other by delicate layers of soft cellular tissue. The 



Clematis fcetida. 



arrangement of the wedges in the circle is not only very 

 beautiful but suggests a combination of great strength 

 and elasticity. Under the microscope the bundles are 

 seen to be formed in great part of rather wide tubes 

 with little pit-like markings on their walls. It is up 

 through these that the fluid nourishment of the plant is 



