126 IOWA ACADEMY OF SCIENCES. 



S. lanceolatum Gray. 



Little Rock (C. R. Ball). 



APOCYNACE^E. 



Apocynum canndbinum L. 



Little Rock (C. R. Ball), Sioux City (B. W.). 



ASCLEPIADACE^E. 



Asclepias tuberosa L. 



Hull (W. Newell), Sioux City (B. W.). 

 A. incarnata L. 



Hull (W. Newell), Sioux City (B. W.). 

 A. Cornuti Decaisne. 



Sioux City (B. W.), Little Rock (C. R. Ball). 

 A. ovalifolia Decaisne. 



Sioux City (B. W.). 

 A. vertidllata L. 



Sioux City, loess mounds, common in open places (B. W., 

 L. H. P.); South Dakota, opposite Ha warden, hills; 

 Turin, Missouri Valley (L. H. P.); Rock Valley (J. F. 

 Jensen and W. Newell). 

 Acerates virdiflora Ell. 



Little Rock (C. R. Ball). 



GENTIANACE^E. 



Gentiana r puberula Michx. 



Sioux City, grassy low lands and hills; not common 

 (B. W.). 

 G. ATidrewsii Griseb. 



Sioux City, meadows of Missouri river bottom (B. W.). 



POLEMONIACE^. 



Phlox pilosa L. 



Sioux City (B. W.); Little Rock (C. R. Bill). 

 p. diva rieata L. 



Sioux City, in rich woods (B. W.). 

 Polemonium reptans L. 



Cherokee, in rich woods (B. W.). 



BORRAGINACE.K. 



Echinospermum Virginicum Lehm. 



Sioux City, woods, along" streets and roadsides (B. W.). 

 Lithospermum canescens Lehm. 



Sioux City, prairies, and loess mounds (B. W.) 

 L. angu8tifolium Michx. 



Sioux Ciiy, prairie and loess mounds (B. W.j. 



