PLATE XLV. RED BIRCH. 



1. Flowering branch with (s) staminate flowers, (p) pistillate flowers, x J. 



2. Branch with mature leaves aud two fruiting strobiles, x J. 



3. A winged seed, enlarged. 



4. A strobile scale, enlarged. 



5. A winter branch with three partly developed terminal staminate aments, x 



6. Section of a winter branch, enlarged. 



