No. 17.] 



AGRICULTURAL COLLEGE. 



119 



Pecan-nut, Carya olivaeformis, Xutt. 



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. 



8hell-bark Hickory. Carya alba, !N"utt. 

 Ames ; Burlington. 



Bittemut. Carya amara, Xutt. 



Ames. 



CUPULIFER.E. 



White Oak. 



Quercus alba, L. 



Ames ; Burlington. 





Bur-Oak. 



Quercus macrocarpa, Michx. 



Ames ; Burlington. 





Chinquapin Oak. 



Quercus prinoides, Willd. 







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





page 282. 





Laurel Oak. 



Quercus imbricaria, Michx. 



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





Black Oak. 



Quercus tinctoria, Bartram. 



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





Red Oak. 



Quercus rubra, L. 



Burlington. 





Pin Oak. 



Quercus palustris, Du Roi. ' 



Burlington. 





Hazel-nut 



Corylus Americana, Walt. 



Ames ; Fayette ; Burlington. 





Beaked Hazel-nut, 



Corylus rostrata, Ait 



Fayette. 





Iron-wood. 



Ostrya Yirgmica, "Willd. 



Ames ; Burlington. 





Blue Beech. 



Carnirms ArnpnV.flim. Afiphv 





Along Des Moines River bluffs, Boone county. 



BETULACEJE, 



White Birch. 



Eetula alba, var. populifolia, Spach. 



Fayette. 



River or Red Birch. Betula nigra, L. 



On authority of Dr. White. 



