LIST OF HIGHER SEED-PRODUCING PLANTS. 205 
ingen (Heer); Amber (Baltic Sea—Conwentz.); Quaternary or 
Pliocene, Japan (athorst); 6 or 7 sp. See also Saporta. 
Polygonum acre HBK. N. Gen. et. Spec. II, 179 (1817). 
P. hydropiperoides Pursu, F). Am. 270 (1814). 
P. hydropiper Micux. Fl. N. Am. I, 238 (1803). 
P. punctatum Evu. 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., FI. S. 
St. 389; Cov., Fl. Ark, 215; Engl.-Damm., Nat. Pfl. 3, I a, 38; Greene, FI. 
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. : 
HeERB.: Bailey 370, Mud river; Holzinger 197, Wi- 
nona Co. 
Polygonum hydropiper Linn. Spec. 517 (1753). 
P. glandulosum Porn. Enc. Meth. VI, 149 (1804). 
P. mite Exvv. 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. IIT, 523; Nym., Fl. Eur.: Herd., Fl. Eur. Russ. 
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; Ballard 604, Prior lake, Scott Co.; Ballard 661, 
Waconia; Taylor 828, Glenwood; Ballard 722, Benton, Carver 
Co.; Ballard 849, Patterson lake, Carver Co.; Roberts 114, Dul- 
uth; Roberts 115, Stewart river; Sandberg 481, Red Wing. 
Polygonum hydropiperoides Micux. Fl. N. Am. I, 239 
(1803). 
P. mite PursH, Fl. Am. 270 (1814). 
P. persoontt 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, Ia, 28. 
S. America and Australia. 
North America: N. Br., Ont., N. Eng. to N. J. and 
Fla.; W. to Minn., Neb., Mo. and Ark. 
