FLOWERING FLAM- AND PEBN8 OF INDIANA. 821 



EUPHORBIA. 



E. polygonifolia L. Sea-side or Knot-weed Spurge. 



In sand soils about the southern shores of Lake Michigan. 

 Not found far inland. One of our most characteristic littoral 

 plants. 



Flowers from July until September. 



Lake (Hill); Porter (Cowles). 



E. maculata L. Spotted Spurge. 



Common throughout the State in dry soils. Frequent on sandy 

 banks and along roadsides. 



Flowers from June until the heaviest frosts. 



Putnam (MacDougal); Vigo (Blatchley); Jay, Delaware, Kan- 

 dolph. and Wayne (Phinney); Xoble (Van Gorder); Franklin 

 (Meyncke); Gibson and Posey (Schneck); Clark (Baird and Tay- 

 lor); Jefferson (J. M. Coulter): Fayette (Hessler); Hamilton and 

 Marion (Wilson); Steuben (Bradner). 



E. humistrata Engelin. Hairy Spreading Spurge. 



Common in old fields and on banks in dry soils. Probably 

 throughout the State. 



Flowers from July until October. 



Tippecanoe (Cunningham); Jefferson (J. M. Coulter); Vigo 

 (Blatchley). 



E. nutans Lag. Large or Lpright Spotted Spurge. 



\E. Preslii Guss.) 



Very widely distributed and abundant, perhaps our most com- 

 mon form. Usually in dry soils in fairly shaded situations. 



Flowers from May until in October. 



Tippecanoe (Cunningham); Daviess (Clements); Jefferson 

 (Barnes); Putnam (MacDougal); Vigo (Blatchley); Jay, Dela- 

 ware, Piandolph, and Wayne (Phinney); Noble (Van Gorder); 

 Franklin (Meyncke); Gibson and Posey (Schneck); Clark (Baird 

 and Taylor); Vermillion (Wright); Fayette (Hessler); Hamilton 

 and Marion (Wilson); Steuben (Bradner). 



E. corollata L. Flowering Spurge. 



In all parts of the State and very abundant. An attractive 

 form used largely in decorations. It grows in dry situations at the 

 edges of fields, along roads or upon railway embankments. It 

 acts as a skin irritant in man 



Flowers from April until in October. 



