IOWA ACADEMY OF SCIENCES. 119 



ONAGRACEAE. 



Oenothera biennis L. 



Hull (W. Newell); Battle Creek (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. serridaf.a Nutt. 



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

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

 mounds abunda.nt. 

 Gaiira parviflora Dougl. 



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

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

 emd fields. 

 G. coccinea Nutt. 



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

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

 Bot. Gazette XIV, 128). 



LOASACE^. 



Mentzelia ornata Torr. & Gray. 



Sioux City on sandy and rocky bluffs along the Big Sioux 

 river. Cedar Bluff's, abundant in that locality (B. W.). 



CUCURBITACE.'E. 



Ecliinocystis lobata Torr & Gray. 



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



CATACE^E. 



Opuntia Bafinesquii Englem. 

 Lyon county (B. W.). 



UMBELLIFER^E. 



Heracleuni lanotum Michx. 



Sioux City (B. W.). 

 Pastinaccc sativa L. 



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

 Cryptotcenia Canadensis D. C. 



Sioux City (B. W.). 

 Zizia a urea Koch. 



Sioux City (B.W.). 

 Gicuta maculata L. 



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

 (B. W.) 



