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. : Bollard 61, Chaska; Sheldon 355, Madison Lake, 

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

 %18a, Lake Helena, Waseca Co. ; Bollard 818, Page lake, Carver 

 Co. ; Bollard 680, Waconia. 



Lemna polyrhiza LINN. Spec. 970 (1753). 

 Lenticula polyrhiza LAM. Fl. Fr. 189 (1778). 

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

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

 L. major C. A. M. Ind. Cauc, 11 (1831). 

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

 Speirodela polyrhiza SCHLEID. Linn. XIII, 392 (1839). 

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

 Telmatophace 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. II, 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. Boss 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. : Bollard 441, Prior's lake, Scott Co. ; Bollard 

 , Waconia; Bollard 60, Chaska; Sheldon 724, Sleepy Eye. 



'GRANTIA GRIFF. Notul. Ill, 236 (1851) not Boiss. 



Wolffia HORKEL, ex. Schleid. Linn. XIII, 389 (1839), not Wulffia 

 Elem. I, 35 (1790). 

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

 Schlecht. (1827). 



Bruniera FRANCHET, Billotia, 25 (1864). 



Benth. and Hook., Gen. PL III, 1001; Durand, Ind. Gen. P/ia?i.451; 

 Engler and Prantl, Nat. Pflanz. 2, III, 164 (Engler). 



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

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



Grantia brasiliensis (WEDD). 



Wolffia brasiliensis 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. columbiana. 



