342 METASPERMAE OF THE MINNESOTA VALLEY. 



Fossil species: Tertiary; Bonn, Bohemia; Euphor- 

 bioides {Wessel and Weber); Euphorbiophyllum {Ettinghausen). 



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: Koth., 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. cyatkophora 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; Oesthind 170, Minneapolis; Herrick 

 268, Minneapolis; Herrick 269, Minneapolis. 



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

 Galarhoeiis corollatiis Haw. Succ. II, 161 (1812). 

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

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

 Ark. 217. 



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



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



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

 sandy fields. 



Herb. : Ballard 644, Chaska; Leonard 44, Fillmore 

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

 lund 169, Minneapolis; A"ttssw6e 213, Minneapolis; Sandberg 491, 

 Goodhue Co. 



Euphorl)ia niar&:iuata Purrh. Fl. Am. II, 607 (1814). 

 E. laiaAoiiui R\v. 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. PHanz. Ill, 5, 106. 



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

 Mo. ; spreading eastward to Ohio. 



