BIRCH 



171 



§§ Periderm reddish or coppery-hrovn, 

 with a silvery glance on the vei-y thin 

 exfoliating lamince, hut not opaque 

 lohite. Small trees; leaves not rhomboid ; 

 twigs stiff and erect, or, at least, not 

 very slender and pendent. 



% Small catkin-bearing tree, usually 

 converted into a shrub by the nume- 

 rous shoots throion up from roots and 



Fig. 77. Birch (lietithi alba) -. rough bark aud base of stem (Irv). 



