Ixxvi 



INTRODUCTION. 



the leaves expand^ and form veins^ as in the 

 Salishuria, The only species belonging to this 

 order found in Em^ope is the Common Yew. 

 Other species occur in the milder climates of a 

 great part of the world, and mthin the Tropics 

 seek a congenial climate high up in the moun- 

 tains. Some of them are valuable as timber 

 trees ; and one, Dacridium taxifolium, a New 

 Zealand tree, attains a height of 200 feet. They 

 are resinous, like the Fir Tribe, and, with the 

 exception of the Common Yew, are harmless. 



