PLATE LXX. WILLOW OAK. 



1. Flowering branch with immature leaves, (s) 



staminate blossoms, (p) pistillate blossoms, 

 (1) immature acorns, x J. 



2. Branch with mature leaves, immature and 



mature acorns, x J. 



3. An acorn cup, x 5. 



4. An acorn, x J. 



5. Winter twig with buds, lenticels, and im- 



mature acorns, x J. 



6. Section of winter twig, enlarged. 



7. Cross section of twig showing pentangular 



pith, wood with conspicuous medullary 

 rays, and bark, enlarged. 



