196 
IOWA ACADEMY OF SCIENCES. 
Morus rubra L. Fremont county. Low woods; frequent. 
Urtica gracilis Ait. Clarke, Montgomery, Pottawattamie, 
Page, and Fremont counties. Low grounds; common. 
Laportea canadensis Gaud. Ringgold and Fremont counties. 
Moist woods; common. 
Pilea pumila Gray. Ringgold and Page counties. Damp 
woods; frequent. 
Parietaria pennsylvanica Muhl. Decatur, Union, Page, and 
Pottawattamie counties. Low woods; frequent. 
Platanace^. 
Platanus occidentalis. Page and Fremont counties. Bottoms; 
frequent. 
JUGLANDACE^. 
Juglans nigra L. Union, Montgomery, Pottawattamie, 
Ringgold, Page, Taylor, and Fremont counties. Rich woods; 
common. 
Gary a alba Nutt. Taylor, Page, Pottawattamie, and Fre- 
mont counties. Upland woods; common. 
C. amara Nutt. Ringgold, Taylor, Page, Fremont, Mont- 
gomery, and Pottawattamie counties. Rich woods; common. 
CUPULIFER^. 
Betula nigra L. Ringgold county. 
Corylus americana Walt. Clarke, Adams, Montgomery, Pot- 
tawattamie, Ringgold, and Page counties. Thickets; common. 
Ostrya virginicaY^iWd. Union and Fremont counties. Bluffs; 
frequent. 
Quercus alba L. Union and Ringgold counties. Woods; 
common. 
Q. macrocarpa Mx. Union, Adams, Montgomery, Pottawat- 
tamie, Ringgold, Taylor, Page, and Fremont counties. Woods; 
common. 
Q. bicolor Willd. Ringgold county. Low woods; frequent. 
Q. muhlenbergii Englm. Union, Adams, Montgomery, Ring- 
gold, and Fremont counties. Upland woods; frequent. 
Q. rubra L. Union, Montgomery, Pottawattamie, Ringgold, 
Taylor, Page, and Fremont counties. Woods; frequent. 
Q. coccinea Wang. Ringgold, Fremont, and Pottawattamie 
counties. Upland woods; common. 
Q. imbr maria Mx. Clarke, Union, and Ringgold counties. 
Upland woods and thickets; common. 
