LIST OF HIGHER SEED-PRODUCING PLANTS. 205 



ingen (Heer); Amber (Baltic Sea Conwentz.); Quaternary or 

 Pliocene, Japan (Nathorst) ; 6 or 7 sp. See also Saporta. 



Polygomim acre HBK. N. Gen. et. Spec. II, 179 (1817). 

 P. tiydropiperoides PURSH, Fl. Am. 270 (1814). 

 P. hydropiper MICHX. Fl. N. Am. I, 238 (1803). 

 P. punctatum ELL. Sk. I, 455 (1824). 



Wats, and Coult., Gray's Man. 6 ed. 442; Britt., Fl. N. J. 209; Mac., 

 Fl. Can. I, 411; Webb., Fl. Neb. 112; Upham, Fl. Minn. 119; Chap., Fl. S. 

 St. 389; Cov., Fl. Ark. 215; Engl.-Damm., Nat. Pfl. 3, I a, 38; Greene, Fl. 

 Fran. 136. 



North America: Ont. and N. Eng. to Minn., Dak. and 

 Neb.; S. to Fla., Mo. and Ark. 



Minn, valley: N. E. district; wet places, around lakes 

 and pools. 



HERB.: Bailey 370, Mud river; Holzinger 197, Wi- 

 nona Co. 



Polygonum hydropiper LINN. Spec. 517 (1753). 

 P. glandulosum POIR. Enc. Meth. VI, 149 (1804). 

 P. mite ELL. Sk. I (1821). 



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

 Fl. Can. I, 411; Webb., Fl. Neb. 112; Upham, Fl. Minn. 119; Coult., Fl. 

 Colo. 320; Led., Fl. Ross. Ill, 523; Nym., Fl. Eur.; Herd., Fl. Eur. Buss. 

 112; Chap., Suppl. S. St. 645; Roth., Wheel. Exp. 232; Hart., Fl. Scand. I, 

 333; Engl.-Damm., Nat. Pflanz. 3, I a, 28. 



All Europe; Arctic Russia to Caucasus, Siberia and 

 Dahuria. 



North America: Atl. to Pac. in Can.; S. to Minn., 

 Neb. and Mo.; introd. E. of Mississippi valley; S. to N. Ga. 



Minn, valley: Throughout: wet ground; shores of 

 lakes and streams. 



HERB.: Sheldon 1477, Pipestone City; Taylor 1153, 

 Glenwood; Bollard 604, Prior lake, Scott Co.; Bailor d 661, 

 Waconia; Taylor 828, Glenwood; Bailor d 722, Benton, Carver 

 Co. ; Bollard 849, Patterson lake, Carver Co. ; Roberts 114, Dul- 

 uth; Roberts 115, Stewart river; Sandberg 481, Red Wing. 



Polygonum hydropiperoides MICHX. Fl. N. Am. I, 239 



(1803). 



P. mite PURSH, Fl. Am. 270 (1814). 

 P. persoonii ENGELM. in Herb. Ledebour. 



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

 Fl. Can. I, 411; Chap. Fl. S. St. 389; Upham, Fl. Minn. 119; Cov., Fl. Ark. 

 216; Webb., Appx. Neb. 27; Engl.-Damm., Nat. Pfl. 3, I a, 28. 

 S. America and Australia. 



North America: N. Br., Ont., N. Eng. to N. J. and 

 Fla. ; W. to Minn. , Neb. , Mo. and Ark. 



