330 Earl Harrington Foote 



Conclusions 



The facts herein presented seem amply to justify the conclu- 

 sion that the several trees at Cedar Point are hybrids between 

 the Quercus imhricaria and the Quercus velutina found there, and 

 that the type tree and others like it are hybrids between imhri- 

 caria and velutina because: 



1. The fruit is sterile so far as is known. 



2. The leaves are intermediate between those of velutina and 

 imhricaria. 



3. The stem in both gross and microscopic anatomy shows 

 characters indicating relationship with both imhricaria and 

 velutina. 



4. The fruit is very much like that of velutina and is wholly 

 unlike that of Q. ruhra. 



5. The staminate flowers of velutina are mature at the proper 

 time for effecting cross pollination. 



6. The trees are invariably isolated from each other and are 

 always found by the side of an imhricaria. 



Furthermore from the last two facts gi"ven, together with Mr. 

 Ward's account of the Leana raised from an acorn of an im- 

 hricaria tree, we may conclude that the maternal parent is im- 

 hricaria, and the paternal, velutina. 



Acknowledgments 



I wish to acknowledge my indebtedness and express my appre- 

 ciation to Professor Stickney for his assistance in every part of 

 this work. I also wish to thank Miss Lett, and Dr. Holden for 

 the material from the type tree, and Professor Jennings, of the 

 Carnegie Museum, for the loan of other specimens of Leana. 



Plate XI 



Fig. L Quercus imhricaria from Cedar Point, O. Branch showing leaves and 

 fruit; X i 



Fig. 2. Quercus velutina from Cedar Point, O. Branch showing leaves and 

 fruit; X | 



Fig. 3. Quercus Leana from Cedar Point, O., tree A. Branches showing 

 leaves; X 5. 



Fig. 4. Quercus Leana from Cedar Point, O., tree B. Branch showing leaves. 

 The entire leaf at the end of the branch has a wavy margin and is crisped; X h 



