342 METASPERMAE OF THE MINNESOTA VALLEY. 



Fossil species: Tertiary; Bonn, Bohemia; Euphor- 

 bioides (Wessel and Weber); Euphorbiophyllum (EttingJiausen). 



Euphorbia dictyosperma FISCH. and MEY. Ind. Sem. 

 Petrop. 37 (1835). 



E. arkansana ENGELM. and GRAY, PL Lindh. I. 53 (1845). 

 Wats, and Coult., Gray's Man. 6 ed.455; Webb., Fl. Neb. 123; Upham, 

 Fl. Minn. 123; Coult., Fl. Colo. 327; Wats., Fl. Calif. II, 75; Greene, Fl. 

 Fran. 90; Roth., Wheel, Exp. 248; Wats., King Exp. 320; Engl. Pax, Nat. 

 Pflanz. Ill, 5, 110. 



North America: Oregon to Santa Barbara; E. to Tex., 

 Ky., Iowa and Minn. 



Minn, valley: W. districts; prairies; infrequent or 

 rare. 



HERB. : Moyer 217, Montevideo. 



Euphorbia heterophylla LINN. Amoen. Acad. Ill, 112 



(1756). 



E. cyathophora MURR. Prodr. Gott. (1770). 



Wats, and Coult., Gray's Man. 6 ed. 454; Webb., Fl. Neb. 123; Upham, 

 Fl. Minn. 123; Cov., Fl. Ark. 217; Engl. Pax. Nat. Pflanz. Ill, 5, 107. 



North America: Minn., 111., Iowa, Neb., Kan., Mo., 

 Ark. and Tenn. ? 



Minn, valley: Throughout; local or infrequent; sandy 

 slopes and sunny banks of streams or lakes. 



HERB. : Sheldon 797, Sigel township, Brown Co. : Shel- 

 don 941, Redwood Falls; Oestlund 170, Minneapolis; Herrick 

 268, Minneapolis; Herrick 269, Minneapolis. 



Euphorbia corollata LINN. Amoen. Acad. Ill, 122 (1756). 



Galarhoeus corollatus HAW. Succ. II, 161 (1812). 



Wats, and Coult., Gray's Man. 6 ed. 454; Britt , Fl. N. J. 214; Mac., 

 FL Can. I, 425; Upham, Fl. Minn. 123; Webb., Fl. Neb. 123; Cov., Fl. 

 Ark. 217. 



North America: L. Huron to Ont. and Mass.; S. toN. 



Y., N. J., Fla.; W. to Minn., Dak., Neb., Ark. and La. 



Minn, valley: Throughout; frequent; dry or open and 

 sandy fields. 



HERB.: Bollard 644, Chaska; Leonard 44, Fillmore 

 Co.; Holzinger 207, Winona Co.; Herrick 267 Minneapolis; Oest- 

 lund 169, Minneapolis -,Kassube 213, Minneapolis; Sandberg 491, 

 Goodhue Co. 



Euphorbia marginata PURSH, FL Am. II, 607 (1814). 



E. leucoloma RAF. in Herb. Phil. (1833). 



Wats, and Coult., Gray's Man. 6 ed. 454; Webb., FL Neb. 123; Upham, 

 Fl. Minn. 123; Coult., Fl. Colo. 327; Engl. Pax, Nat. Pflanz. Ill, 5, 106. 



North America: Minn., Dak., Colo., Neb., Kan. and 

 Mo. ; spreading eastward to Ohio. 



