PLATE LIX. YELLOW OAK. 



1. Flowering branch with immature leaves, (s) staminate blossoms, (p) pistillate blossoms, x |. 



2. Branch with mature leaves and mature acorns, x J. 



3. An acorn, x i. 



4. An acorn cup, x |. 



5. Terminal section of winter twig, x I. 



6. Section of winter twig showing buds, lenticels, and leaf -scars with bundle-scars, enlarged. 



