PLATE LVII. BUR OAK. 



1. Flowering branch with immature leaves, (s) staminate blossoms, (p) pistillate blossoms, x 4 



6. Branch with mature leaves and mature acorns x J 



3. An acorn cup, x J. 



4. An acorn, x j. 



5. A winter branch showing buds, leaf -scars, and raised corky ridges, i i. 



b. I erminal section of winter branch showing bud with overlapping scales and leaf scar with 

 uu i M 1 1 < ' - s ( * *i r s , <? n 1 a. rgocl . 



7. Basal bud-scale with hairy margin, enlarged. 



8. Apical bud-scale with hairy ser-'atc margin enlarged. 



