130 About Leaves. 



144. Trees which lose their leaves in autumn 

 are called de-cid'u-ous, which means falling off. 

 Those which retain their leaves through the 

 winter, or until new leaves appear, are called 

 evergreen. An apple tree is deciduous, and a 

 hemlock i evergreen. 



145. Leaves differ from each other very 

 greatly in their size, shape, color, and construc- 

 tion ; some have smooth edges, while others 

 have saw-like edges ; some are long and narrow, 

 like those of Indian corn and the sugar cane, 

 while others are broad and round, like the cab- 

 bage and begonia. Leaves differ from each 

 other also in regard to the number and arrange- 

 ment of their veins. 



Leaf Veins. Veinlets. Veinulets. 



146. VEINS. The first leaf above shows its 

 stem or foot-stalk, called its pet'-i-ole (/ > ), from 

 which, at the base of the leaf, spring its veins, 

 five in number. 



