IOWA ACADEMY OP SCIENCES. 
119 
ONAGRACEAE. 
Oenothera biennis L. 
Hull (W. Newell); Brittle Creek (E. G. Preston); Little 
Rock (C. R. Ball); Council Bluffs (L. H. P.). A weed 
in streets ?.nd waste places, and fields abundant 
throughout western Iowa. 
0. serrulata Nutt. 
Sioux City (B. W.); Battle Creek (E. G. Preston); Little 
Rock (C. R. Ball); Hull (W. Newell). Praries and loess 
mounds abundant. 
Gaura pa ) ’v ijio ra Dough 
Sioux City, base of mounds (B. W.); Missouri Valley (L. 
H. P.). It is spreading eastward, occurring in meadows 
and fields. 
G. eoecinea Nutt. 
Sioux City (B. W.) Missouri Valley, Turin top of loess 
mounds, common (L. H. P.); Hamburg (Hitchcockj 
Bot. Gazette XIV, 128). 
LOASACE^. 
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^. 
Ecliinocystis lobata Torr & Gray. 
Turin, low ground along streams (L. H. P.). 
CATAGBA5. 
Opuntia Rafinesquii Englem. 
Lyon county (B. W.). 
UMBELLIFER^. 
Heracleum lanatuni Michx. 
Sioux City (B. W.). 
Pastinaca sativa L. 
A roadside weed. Council Bluffs, Sioux City (L. H. P.). 
Cryptotcenia Canadensis D. C. 
Sioux City (B. W.). 
Zizia aurea Koch. 
Sioux City (B. W.). 
Cieuta maculata L. 
South Dakota opposite Hawarden (L. H. P.); Sioux City 
(B. W.) 
