

IOWA ACADEMY OF SCIENCES. 119 



ONAGRACEAE. 

 Oenothera biennis L. 



Hull (W. Newell); Battle Cre?k (E. G. Preston); Little 

 Rock (C. R. Ball); Council Bluffs (L. H. P.). A weed 

 in streets and waste places, and fields abundant 

 throughout western Iowa. 

 0. serrulata Nutt. 



Sioux City (B. W.); Bittle Creek (E. G. Preston); Little 

 Rock (C. R. Ball); Hull (W. Newell). Praries and loess 

 mounds abundant. 

 Gaura parviflora Dougl. 



Sioux City, base of mounds (B. W.); Missouri Valley (L. 

 H. P.). It is spreading eastward, occurring in meadows 

 and fields. 

 G. coccinea Nutt. 



Sioux City (B. TV\) Missouri Valley, Turin top of loess 

 mounds, common (L. H. P.); Hamburg (Hitchcock, 

 Bot, Gazette XIV, 128). 



LOASACE^E. 



Mentzelia ornata Torr. & Gray. 



Sioux City on sandy and rocky bluffs along the Big Sioux 

 river, Cedar Bluffs, abundant in that locality (B. W.)> 



CUCURBITACE.E. 



Echinocystis lobata Torr & Gray. 



Turin, low ground along streams (L. H. P.). 



CATACE^E. 



Opuntia Rafinesquii Englem. 

 Lyon county (B. W.). 



UMBELLIFER^E. 



Heracleum lanatum Michx. 



Sioux City (B. W.). 

 Pastinaca sativa L. 



A roadside weed. Council Bluffs, Sioux City (L. H. P.). 

 Oryptotamia Canadensis!). C. 



Sioux City (B. W.). 

 /'.<" aur a Koch. 



Sioux City (B. W.). 



fa maculata L. 



South Dakota opposite Hawarden (L. H. P.); Sioux City 

 (B. W.) 



