114 IOWA ACADEMY OF SCIENCES. 



TILIACE.E. 



Tilia Americana L. 



Sioux City, Turin, Missouri Valley, Council Bluffs, ravines 

 between loess mounds (L. H. P.); back of mounds an 

 abundant tree. 



I^INACE^. 



Linum sulcatum Riddell. 



Sioux City, top and sides of loess mounds, prairies (L. H. 

 P.), (B. W.); Little Rock (C. R. Ball). 

 L. rirjidum Pursh. 



Sioux City, loess mounds, capsules and old stems only 

 found by myself (L. H. P.)j Hamburg (Hitchcock, Bot. 

 Gazette, XIV, 128). 



GERANIACE.E. 

 Oxalis violaceoi L. 



Sioux City, in woods frequent (B. W.); Little Rock (Herb. 

 C. R. Ball). 



0. corniculata L. var. stricta Sav. 



Turin, Onawa, in woods and fields abundant (L. H. P.); 

 Sioux City (B. W.). 

 Impatiens pallida Nutt. 



Sioux City, in woods along streams (B. W.). 



1. Fulva Nutt. 



Sioux City, in woods along streams (B. W.). 



RUTACE.^. 



Xanthoxylum Americanum Nutt. 



Sioux City, common in woods (B. W.); South Dakota, oppo- 

 site Hawarden, in valleys between hilis (L. H. P.). 



CELASTKACE.E. 



Celastrus scandens L. 



Sioux City, common in woods letween loess mounds (B. W. 

 and L. H. P.). 

 Euonymus atropurpureus Jacq. 



Sioux City, in woods between loess mounds (B. W., L. H. P.); 

 South Dakota, opposite Hawarden (L. H. P.). 



RHAMNACE.^. 



Mhamnus lanceolata Pursh. 



Logan, low hills in woods (L. H. P.), Sioux City, level 

 woodland near the Big Sioux river (B. W.). 



