320 Earl Harrington Foote 



very large leaves practically like the juvenile leaves of velutina 

 are often found. 



The leaves of tree A are smaller than those of tree B and the 

 distinctive three lobed apex is often found, while in tree B the 

 leaves are generally five or seven lobed and rarely show a three 

 lobed apex. The leaves of tree A measure 8| to 13 cm. by 3f to 

 8 cm.; those of tree B, 11 to 171 cm. by 4 to 12| cm. The petiole 

 is longer than that in imhricarid and the base more obtuse, char- 

 acters suggesting velutina. The leaves are arranged on the stem 

 in a fashion very similar to those of imhricaria giving almost the 

 characteristic shingle appearance. On a twig of a single year's 

 growth the leaves at its beginning are lobed but not as deeply 

 as those in the middle and toward the end, but at the end of the 

 stem, contrary to what one would expect, there are usually one 

 or more leaves which are entire and practically like imhricaria 

 leaves (plates XI and XII). The young leaves of imhricaria 

 are covered on the lower side with a thick hoary tomentum, 

 while there is a scurf} pubescence on the upper side. In the bud 

 of imhricaria the leaves are involute, while in velutina and Leana 

 they are convolute. Sargent" mentions this. 



In both trees of Leana the acorn, with its turbinate cup which 

 has closely appressed hoary scales fringed at the rim, is more 

 nearly like that of velutina than imhricaria and is so unlike that of 

 ruhra that the red oak is out of the question. The male flowers 

 of tree A have peduncles that are intermediate in length between 

 those of irnhricaria and velutina, while the peduncles of tree B 

 are equal in length to those of velutina. Imhricaria peduncles 

 are about 4 cm. in length, velutina, 8 to 8| cm., Leana, tree A, 

 6 to 6^ cm., and tree 5, 8 to 9 cm. 



Owing to the inaccessibility of Cedar Point continuous ob- 

 servation of the trees cannot be made from Granville, but on May 

 14, 1910, I found that the pistillate flowers of all three kinds had 

 matured, and that good staminate flowers of velutina were very 

 scarce, the anthers having shed their pollen in nearly all cases. 

 Good specimens of staminate flowers of imhricaria and Leana 

 were abundant. Therefore I conclude that the stigmas of the 

 pistillate flowers on a tree ripen before the anthers of its staminate 

 flowers, thereby securing cross fertilization. The slight dif- 



11 Sylva of North America, vol. viii, p. 176, 1895. 



