174 JUGLANDACE^. [parti. 



CHAPTER XL 



THE CATKIN-BEARING TREES : ILLUSTRATED BY THE WALNUT, 

 THE HICKORY, THE WILLOW, THE POPLAR, THE ALDER, THE 

 BIRCH, THE OAK, THE BEECH, THE SWEET CHESTNUT, THE 

 HAZEL, THE HORNBEAM, THE HOP HORNBEAM, THE PLANE 

 TREES, THE LIQUIDAMBAR, MYRICA, COMPTONIA, CASUARINA, 



AND Garry a elliptica. 



The plants contained in this chapter are 

 placed by modern botanists in six or seven 

 different orders ; but I have been induced to 

 group them together, both because they follow 

 each other in regular succession, and because 

 there is a certain degree of general resemblance 

 which connects them together, and renders it 

 easier to retain their names when linked together 

 by the association of ideas, than it would have 

 been if they had been each described separately. 



The first order of catkin-bearing trees that I 

 shall describe is called Juglandacese, and it con- 

 tains three genera, only two of which, the 

 Walnuts and the Hickories, are common in 

 British gardens. The second order, Salicacese, 

 contains also two genera, the Willows and the 

 Poplars ; the third, Betuiacese, contains both 

 the Alders and the Birch trees ; the fourth, 



