180 IOWA ACADEMY OF SCIENCES. 



/. falva Nutt. Fremont county. With the preceding; infre- 

 quent. 



RUTACE^ 



Xantlioxylum amencana Mill. Ringgold, Page, Taylor, Fre- 

 mont, Montgomery, and Pottawattamie counties Thickets: 

 common. 



Celastrace^. 



Celastrus scandens L. Ringgold, Taylor, Fremont, and Pot- 

 tawattamie counties. Woods; frequent. 



Euomjmus cdroimrjmreus Jacq. Page and Pottawattamie 

 counties. Woods; frequent. 



Rhamnace^. 



Bliamnus laneeolata Pursh. Ringgold, Page, Adams, Mont- 

 gomery, and Pottawattamie counties. Upland thickets; com- 

 mon. 



Ceanothus americanus L. Ringgold, Taylor, Page, and 

 Montgomery counties. Prairies; infrequent. 



C. ovatus Desf. Adams, Montgomery, and Pottawattamie 

 counties. Prairies; common. 



C. ovatus pubescent T. & G. Pottawattamie county. Com- 

 mon. 



VlTACE.E. 



Yitis riparia Mx. Clarke, Adams, Montgomery, Pottawat- 

 tamie, Ringgold, Page, Taylor, and Fremont counties. Woods 

 and thickets; common. 



T'. ciuerea Eng. Page and Fremont counties. Woods; 

 infrequent. 



Cissus ampelopsw Pers. Fremont county. Common in 

 woods bordering the Missouri river. 



Ampelopsis quinquefolla Mx. Adams, Montgomery, Potta- 

 wattamie, Ringgold, Page, and Fremont counties. Thickets; 

 common. 



SapindacevE. 



Aesculus glabra Willd. Ringgold, Taylor, and Union counties; 

 rich woods; frequent. 



Acer da.si/carpum Ehrh. Clarke, Adams, Montgomery, Ring- 

 gold, and Fremont counties; moist woods and artificial groves; 

 common. 



Negundo aceroides Moench. Union, Adams, Montgomery, 

 Pottawattamie, Ringgold, Taylor, and Fremont counties; rich 

 woods; common. 



