A STUDY OF THE SUPPOSED HYBRID OF THE BLACK 

 AND SHINGLE OAKS^ 



(Contribution from the Botanical Laboratory of Denison University, No. XI) 



Eakl Harrington Foote 



Histoi'ical sketch of Quercus Leana 316 



Description of Cedar Point representatives 318 



Gross anatomy of the stem 321 



Microscopic studies 322 



Quercus imbricaria 



Transverse 323 



Tangential 324 



Radial 324 



Quercus velutina 



Transverse 325 



Tangential 325 



Radial 326 



Quercus Leana 



Transverse 326 



Tangential 32ft 



Radial 326 



Summary of microscopic studies ; 327 



Comparison with the type tree and others 327 



Conclusions 330 



HISTORICAL SKETCH OF QUERCUS LEANA 



Quercus Leana Nutt., a supposed hybrid between the two species 

 Q. imhricaria Michx. and Q. velutina Lam., received its name 

 from Mr. T. G. Lea who discovered a single specimen near 

 Cincinnati, Ohio, about seventy or eighty years ago. A part of 

 Lea's description of the tree reads as follows: 



If a hybrid, it may have come from the Q. imhricaria or Q. tindoria 

 {velutina) or Q. coccinea. The fruit is too widely different from Q. rubra. 

 The peduncles are aljout the same length as in my specimens of Q. 



1 Work done under the direction of Prof. Malcolm E. Stickney as part require- 

 ment for the degree of Master of Science, Denison University. 



315 



