134 METASPERMAE OF THE MINNESOTA VALLEY. 



North America : Atl. to Pac, in Can. ; to lat 58° N, ; 

 S. to N. J. and W. to Minn., Neb. and N. Mex., Oregon and 

 Calif. 



Minn, valley: Throughout; not infrequent; ponds and 

 pools, floating on the surface. 



Herb. : Ballard 61, Chaska; Sheldon 355, Madison Lake, 

 Blue Earth Co. ; Ballard 442, Prior's lake, Scott Co. ; Taylor 

 218a, Lake Helena, Waseca Co. ; Ballard 818, Page lake. Carver 

 Co.; Ballard 680, Waconia 



Lemiia polyrliiza Linn. Spec. 970 (1753). 

 L^nticula polyrhiza Lam. F1. Fr. 189 (1778). 

 Lemna orbicularis Kit. in Schult. Ostr. Fl. ed. 2, 64 (1814). 

 L. thermalis Beauv. in Nutt Gen. I, 19 (1818). 

 L. majcn- C. A. M. Ind. Cauc. 11 (1831). 

 L. orbiculata Roxb. Fl. Ind. Ill, 565 (1832). 

 Speirodela polyrliiza Schleid. Linn. XIII, 392 (1839). 

 Lemna bannatica Kunth, Enum. Ill, 7 (1841). 

 Telmatopliace polyrhiza Godr. Fl. Lorr. Ill, 18 (1844). 

 T. orbicularis Schctr. Enum. 635 (1866). 

 Wats, and Coult., Gray's Man. 6 ed. 552; Britt., Fl. N. J. 255; Upham, 

 Fl. Minn. 135; Mac, Fl. Can. H, 75; Webb., Fl. Neb. 97; Wats., Fl. Calif. 

 II. 190; Coult., Fl. Colo. 360; Chap., Fl. S. St. 443; Hook , Fl. Gt. Brit. 425; 

 Nym., Fl. Eur.; Led., Fl. Ross IV, 18; Richt., PI. Eur. 175; Herd., Fl. Eur. 

 Russ. 122; Engl., Nat. Pflanz. II. 3, 164; Mac, Fl. Can. II, 368; Wats., King 

 Exp. 336; Cov., Fl. Ark. 228; Hart., Fl. Scand. I, 429. 



Europe — except Greece; Russia and Siberia; Australia; 

 Madeiras; Central America and West Indies. 



North America: Same distribution as last. 

 Minn, valley : Throughout; abundant; ponds and 

 pools; floating on the surface. 



Herb. : Ballard 44.1, Prior's lake, Scott Co. ; Ballard 

 882, Waconia; Ballard 60, Chaska; Sheldon 724, Sleepy Eye. 



GRANTIl Grib^f. Notul. HI, 236 (1851) not Boiss. 



Woima HoRKEL, ex. Schleid. Linn. XIII, 389 (1839), not Wulttia 

 Neck. Elem. I, 35 (1790). 



Horkelia Reich, ex. Baitl. Ord. Nat. 76 (1830), not Cham, and 

 Schlecht. (1827). 



Bruniera Franciiet, Billotia, 25 (1864). 

 Benth. and Hook., Gen. PL III, 1001; Durand, 1ml. Gen. Phan.\o\: 

 Englerand Pranil, Isat. Pfianz. 2, III, 164 (En^Mer). 



Living species: 12; Europe; E. Indies; tropical Africa 

 and America to Canada and Chile. N. America, 2 sp. 



Grantia brasiliensis (Wedd). 



Wolffia bnisiliensis Wedd. Ann. Sci. Nat. ser. 3, XII, 157 (1849). 

 Wats, and Coult., Gray's Man. 6 ed. 553; Mac, Fl. Can. II. 76. 

 North America: With G. columhiana. 



