BIRCH. 



27!) 



Plate 27. Betula lutca. Yellow Birch. 



i. Flowering branch, one-half natural size. 2. Staminate flower, en- 

 larged. 3. Pistillate flower, enlarged. 4. Fruiting branch, one-half nat- 

 ural size. 5. Nut, enlarged. 6. Scale of trujting catkin, enlarged, j. Win- 

 ter branch, showing staminate catkin, one-half natural size. 



