126 IOWA ACADEMY OF SCIENCES. 



S. kmceolatum Gray. 



Little Rock (C. R. Ball). 



APOCYNACE^. 

 Apocynum cannnbinum 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. ovalifoUa Decaisne. 



Sioux City (B. W.). 

 A. verticiUata 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. P. 

 Jensen and W. Newell). 

 Acerates virdiflora Ell. 



Little Rock (C. R. B.ill). 



GENTIANACE.'E. 



Genticma jniberula Michx. 



Sicux City, grassy low lands and hills; not common 

 (B. W.). 

 G. Andrcicsit Griseb. 



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



POLEMONIACE/E. 



Phlox 'pilosa L. 



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

 P. divaricata L. 



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

 Polemonium repfans L. 



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



BORRAGINACE.-E. 



Echinospermum Yirfjiri icuin Lehm. 



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

 Lithospermum canescens Lehm. 



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

 L. angustifolium Michx. 



Sioux Ciiy, prairie and l:ess mounds (B. W.). 



