180 
IOWA ACADEMY OP SCIENCES. 
I. falva Nutt. Fremont county. With the preceding; infre- 
quent. 
Rutaoe^ 
Xantlioxtjlum americana Mill. Ringgold, Page, Taylor, Fre- 
mont, Montgomery, and Pottawattamie counties Thickets; 
common. 
CeLASTRACEtE. 
Gelastrus scandens L. Ringgold, Taylor, Fremont, and Pot- 
tawattamie counties. Woods; frequent. 
Euonymus atroimrjyur&m Jacq. Page and Pottawattamie 
counties. Woods; frequent. 
Rhamnace^. 
Rliamnus lanceolata Pursh. Ringgold, Page, Adams, Mont- 
gomery, and Pottawattamie counties. Upland thickets; com- 
mon. 
Ceanotlius americanus L. Ringgold, Taylor, Page, and 
Montgomery counties. Prairies; infrequent. 
G. ovatus Desf. Adams, Montgomery, and Pottawattamie 
counties. Prairies; common. 
G. ovatus pubescens T. & G. Pottawattamie county. Com- 
mon. 
VlTACE^. 
Vitis riparia Mx. Clarke, Adams, Montgomery, Pottawat- 
tamie, Ringgold, Page, Taylor, and Fremont counties. Woods 
and thickets; common. 
V. cinerea Eng. Page and Fremont counties. Woods; 
infrequent. 
Gissus ampelopsis Pers. Fremont county. Common in 
woods bordering the Missouri river. 
Ampelopsis quinquefoUa Mx. Adams, Montgomery, Potta- 
wattamie, Ringgold, Page, and Fremont counties. Thickets; 
common. 
Sapindace^. 
Aesculus glabra Willd. Ringgold, Taylor, and Union counties; 
rich woods; frequent. 
Acer das^jcarpum Ehrh. Clarke, Adams, Montgomery, Ring- 
gold, and Fremont counties; moist woods and artificial groves; 
common. 
Negundo aeeroides Moench. Union, Adams, Montgomery, 
Pottawattamie, Ringgold, Taylor, and Fremont counties; rich 
woods; common. 
