206 METASPERMAE OF THE MINNESOTA VALLEY. 



Minn, valley: Throughout; wet places, edges of pools 

 and lakes, in the water. 



Herb.: Sheldon S81, Sleepy Eye; Herrick 257, Minne- 

 apolis; i7er?'^■c^' 25S, Minneapolis; OesUund 159, Hennepin Co. ; 

 Oestlund 160, Hennepin Co. ; Herb. Sheld. 1674, Minneapolis. 



Polygoimni hartwrightii Gray, Proc. Am. Acad. VHI, 

 294 (1870). 



Wats, and Coult., Gray's Man. 6 ed. 441; Britt., Fl. N. J. 209; Webb., 

 Fl. Neb. 112; Mac, Fl. Can. I, 410; Wats., Fl. Calif. II, 14; Upham, Fl. 

 Minn. 119; Coult, Fl. Colo. 320; Greene, Fl. Fran. 136. 



North America: Anticosti, Ont. to Hudson Bay and 

 Owen Sound; S. to N. Eng. and N. J. ; W. to Minn., Iowa, Neb., 

 Utah, California and Pac. coast. 



Minn, valley: Throughout; moist banks and shores- 

 and around pools. 



Herb.: Taylor 224, Janesville; Sheldon ^48, Waseca; 

 Sheldon 988, ^lee-pj 'Eye; Oestlund 161, Hennepin Co.; Bailey 

 417, Long lake. 



Polygonum emersum (Michx.) Britt. Cat. N. J. 209 (1890). 



p. historta Walt. Fl. Car. 131 (1788) not Linn. 



P. amphibium var. terrestre Willd. Spec. II (1799). 



P. ampliiUum emersum Michx. Fl. N. Am. I, 240 (1803). 



P. coccinneum terrestre Muhl. Cat. 40 (1813). 



P. amphibium var. (?) muhlenbergii Meisn. Mon. Polyg. (1856). 



P. muhlenbergii S. Wats. Proc. Am. Acad. Sci. XIV (1879). 



P. terrestre B. S. P. Cat. N. Y. (1888). 

 Wats, and Coult., Gray's Man. 6 ed. 441; Britt., Fl. N. J. 209; Upham,, 

 Fl. Minn. 119; Mac, Fl. Can. I, 410; Wats., Fl. Calif. II, 13; Coult., Fl. 

 Colo. 320; Mac, Fl. Can. 11,353; Roth., Wheel. Exp. 232; Webb., Appx. 

 Neb. 27; Greene, Fl. Fran. 137. 



North America: Prairie regions of Can. to Saskatch- 

 ewan and Brit. Col. ; S. to N. Eng., Pla. and Miss. ; W. to Wash- 

 ington, Oregon, Calif, and Tex. 



Minn, valley: Throughout; wet places; sandy beaches 

 and shores of streams. 



Herb.: Sheldon 1192, New Ulm; Sheldon 1396, Lake 

 Benton; Taylor 1073, Glenwood; Leiberg 56, Blue Earth Co.; 

 Herrick 259, Minneapolis; Bailey 366, Mud river; Sandberg 

 482, Red Wing; Herb. Moyer 214, 215, Chippewa river, near 

 Montevideo. 



Polygonum amphibium Linn. Spec. 361 (1753). 



P. purpureum Giliu. Exerc. Phyt. II, 4.33 (1792). 



P. amphibium var. a<juaticum Willd. Spec. II, (1799). 



P. coccinneum MuiiL Cat. 40 (1813). 



Persicaria amphibixt S. h. Gray, Arr. II, 268(1821). 



