132 IOWA ACADEMY OF SCIENCES. 



URTICACE.E. 

 Ulmus fulva Micbx. 



Sioux City, in valleys between loess mounds (B. W., L. H 

 P.); South Dakota opposite Hawarden. 

 U. Americana L. 



Sioux City, along the Big Sioux river and Missouri river 

 (B. W., L. H. P.). 

 Celtis occidentalis L. 



Sioux City, along Missouri and Big Sioux rivers (L. H. P.). 

 Cannabis sativa L. 



Missouri Valley (L. H. P. observations); Sioux City 

 (B. W.). 

 Humulus Lupulus L. 



Sioux City (B. W.)- 

 Urtica gracilis Ait. 



Sioux City (B. W.); Little Rock (Herb. C. R. Ball.). 

 Laportea Canadensis Gaudichaud. 



Sioux City (B. W.). 

 Pilea pumila Gray. 



Logan (L. H. P.) 

 Parietaria Pennsylvanica Muhl. 

 Turin (L. H. P.). 



JUGLANDACE.E. 

 Juglans nigra L. 



Sioux City (B. W.). 

 Carya oUvceformis Nutt. 



Sioux City (Hitchcock) ; this is further north than it occurs 

 elsewhere in this state. 

 C. amara Nutt. 



Smithland (B. W.). 



CUPULIFER.^. 

 Corylus Americana Walt. 



Sioux City (B.W.). 

 Ostrya Virginica Willd. 



Council Bluffs, in woods, back of steep mounds (L. H. P.); 



Logan (L. H. P.); Sioux City (B. W.). 

 Quercus macrocarpa Michx. 



Council Bluffs (L. H. P.). 

 Var. oUvceformis Gray. 



Sioux City, sides of bluffs (L. H. P., B. W.) 

 Q. rubra L. 



Sioux City (B. W.). 



