534 METASPERMAE OF THE MINNESOTA VALLEY. 



AMBROSIA Linn. Gen. 718 (1737). 

 Fraiiseria Cav. Ic. II, 78 (1793). 

 Heiuianibrosia Delp. Stui. Art. 57 (1871). 

 Heinixaiitliidiuin Delp. 1. c. 62 (1871). 

 Xantliidiuiu Delp. 1. c. 62 (1871). 

 Hyiiienoclea T. and G. PI. Fendl. 79 (1849). 

 Baillon, Hist. PI. VIII, 286: Beath. and Hook., Gen. PL II, 354; Du- 

 rand, Ind. Gen. Phan. 207; Engler and Prantl, Nat. Pflcmz. IV, 5, 221 

 (Hoffmann). 



Living species: 35 ±; Mediterranean region, Africa, 

 N. and C. America, Sandwich Isls. U. S., 24; Canada, 6; S. 

 Sts., 4; California, 13; Rocky mts.. 7; W. Tex., 5. 



Ambrosia psilostachya DC. Prodr, V, 526 (1836). 

 A. peruviana DC. Prodr, V, 526 (1836). 

 A. coronopifolia T. and G. Fl. II, 291 (1841). 

 Wats, and Coult., Gray's Man. 6 ed. 273; Coult., Fl. Colo. 181: Webb., 

 Fl.Neb. 147; Mac, Fl. Can. I, 240; Upharn, Fl. Minn. 79; Brew, and 

 Wats., Fl. Calif. I, 344; Griseb., Fl. W. I.; Wats., Kin.t? Exp. 165; Roth,, 

 Wheel. Exp. 158; Cov., Fl. Ark. 194; Gray, Syn. Fl. I, 2, 250: Coult., Fl. 



Tex. 210. 



North America: 49" N. in N. W. T. and Saskatche- 

 wan to Minn., Wise, 111., Neb., Tex. and Mex. to Calif., Nev. 

 and Arizona. 



Minn, valley: Throughout; habitat as in A. artemis 

 iaefolia Linn. 



Herb. : Taylor II4.6, Starbuck, Pope Co ; Sheldon 

 1522, Lake Benton; Oesilund 95, Hennepin Co.; Sandberg 316, 

 Red Wing. 



Ambrosia artemisiaefolia Linn. Spec. 987 (1753). 



J., eto^ior Linn. Spec. 988 (1753). 

 Iva monophylla Walt. Fl. Car. 233 (1788). 

 Ambrosia absinthifolia MiCHX. Fl. N. Am. II, 183 (1803). 

 A. paniculata Michx. Fl. N. Am. II, 183 (1803). 

 A. heterophylla Muhl. Willd. Spec. IV, 378(1805). 

 Wats, and Coult., Gray\s Man. 6 ed. 273; Britt., Fl. N. J. 143; Webb.. 

 Fl. Neb. 147; Upham, Fl. Minn. 79; Mac, Fl. Can. I, 240: Chap., Fl. S. 

 St. 223; Coult., Fl. Colo. 180; Brew, and Wats., Fl. Calif. I, 344: Griseb., 

 Fl W. I.; Wats., King Exp. 165; Cov., Fl. Ark. 194: Engl. Hoffmann, 

 Nat. Pflanz. IV, 5, 222; Gray. Syn. Fl. I, 2, 249; Coult., Fl. Tex. 210. 

 Introduced in W. Europe; Brazil and W. Indies. 

 North America: Across continent to Mex. and Hud- 

 son Bay, N. W. T. and Labrador. 



Minn, valley: Throughout; hillsides, fields, roads, 

 thickets and forest openings. 



Herb.: Trrylor 75.3\, Elysian; Ballard SOI, St. Boni- 

 facius; Ocsiliind OJ^, Minneapolis; OesUnnd 95, Hennepin Co.; 

 Holzinger 122, Winona Co. ; Sandberg S15, Red Wing. 



