PLATE LXIII. PIN OAK. 



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



(i) immature acorns, x 5. 



2. liranch with mature leaves, immature and mature acorns, x i. 



3. An acorn cup, x 5. 



4. An acorn, x \. 



5. Winter twig with immature acorns, buds, and one pin-like branchlet, x J. 



6. Winter branch with two pin-like branchlets, x J. 



7. Section of a winter branch, enlarged. 



