No. 17.] 



AGRICULTURAL COLLEGE. 



119 



Pecan-nut. Carya olivseformis, Nutt 



Dr. White in his Report on the Geology of Iowa, gives this as 

 one of the trees of Iowa. I have not seen it in the State. 



Shell-bark Hickory. Carya alba, Nutt. 

 Ames ; Burlington. 



Bitternut. Carya amara, Isutt. 



Ames. 



CUPULIFERJE. 



White Oak. 



Bur-Oak. 



Quercus alba, L. 



Ames ; Burlington. 



Quercus macrocarpa, Michx. 



Ames ; Burlington. 



Chinquapin Oak. Quercus prinoides, Willd. 



On authority of Dr. Vasey in 2d vol. Am. Ent. and Botanist, 

 page 282. 



Quercus imbricaria, ATichx. 



In the State, on the authority of Dr. White. 



Quercus tinctoria, Bartram. 



In the State, on the authority of Dr. White. 



Quercus rubra, L. 



Burlington. 



Quercus palustris, Du Hoi. 



Burlington. 



Corylus Americana, "Walt. 



Ames ; Fayette ; Burlington. 



Beaked Hazel-nut. Corylus rostrata, Ait. 

 Fayette. 



Ostrya Virginica, Willd. 



Ames ; Burlington. 



Carpinus Americana, Michx. 



Along Des Moines River bluffs, Boone county. 



Laurel Oak. 

 Black Oak. 

 Red Oak. 



Pin Oak. 

 Hazel-nut. 



Iron-wood. 

 Blue Beech 



BETULACEJ?, 



White Birch. 



Betula alba, var. populifolia, Spach. 



Fayette. 



River or Red Birch. Betula nigra, L. 



On authority of Dr. White. 



