IOWA ACADEMY OF SCIENCES. 163 



Parietarla pennsylvonica Muhl. Shelby and Johnson Cos. 

 Low woods, frequent. 



PEAXTAXACE.-E. 



Plantanus occidentalis L. Decatur, Van Buren, Lee, Des 

 Moines, and Johnson Cos. A frequent tree along the larger 

 rivers. 



JUGLAXDACE^E. 



Juglans cinerea L. Johnson Co. Rich woods, frequent. 



J. nigra L. Decatur, Appanoose, Van Buren, and Johnson 

 Cos. Rich woods, frequent. 



Carya alba Nutt. Decatur, Appanoose, Wapello, Van Buren, 

 Shelby, and Johnson Cos. Upland woods, common once but 

 disappearing. 



C. sulcata Nutt. Decatur, Appanoose, and Van Buren Cos. 

 Along rivers, once common, yet frequent. 



C. amara Nutt. Decatur, Appanoose, Shelby, and Johnson 

 Cos. Rich woods, common. 



CUPULIPER.E. 



Betula nigra L. Appanoose and Johnson Cos. Woods, fre- 

 quent. 



Corylus americana Walt. Decatur, Appanoose, Wapello, Van 

 Buren, Shelby, and Johnson Cos. Thickets, common. 



Ostrya virginica Willd. Decatur, Henry, and Johnson Cos. 

 Woods, frequent. 



Carpinus caroliniana Walter. Decatur, Appanoose, Wapello, 

 Van Buren, Des Moines, and Johnson Cos. Woods, frequent. 



Quercus alba L. Decatur, Appanoose, Wapello, Van Buren, 

 and Johnson Cos. Upland woods, common. 



Q. stellata Wang. Appanoose Co. One small grove known. 



Q. macrocarpa Mx. Decatur, Appanoose, Van Buren, Shelby, 

 and Johnson Cos. Woods, common. This is a large tree along 

 the rivers, but a shrub on the prairies. 



Q. bicolor Willd. Decatur and Appanoose Cos. Along 

 rivers, frequent. 



Q muhlenbergii Englm. Decatur, Appanoose, Van Buren, 

 Henry and Johnson Cos. Woods along streams, frequent. 



Q. prinoides Willd. Decatur and Appanoose Cos. Prairies 

 and upland woods, common. Similar to preceding, but of 

 diminutive size, usually one or two feet high. 



