LIST OF HIGHER SEED-PRODUCING PLANTS, 207 
Wats. and Coult., Gray’s Man. 6 ed. 440; Britt., Fl. N. J. 209; Mac., 
Fl. Can. I, 410; Upham, Fl. Minn. 119; Webb., Fl. Neb. 112; Wats., 
Fl. Calif. IT, 13; Coult.. Fl. Colo. 320; Miyabe., Fl. Kur. 257; Led., 
Fl. Ross. III, 620; Nym., Fl. Eur.; Trautyv., Fl. Sib. 100; Hook., Fl. Gt. 
Brit. 344; Herd., Fl. Eur. Russ. 112; Wats., King Exp. 316; Roth., Wheel. 
Exp. 232; Cov., Fl. Ark. 215; Hart., Fl. Scand. I, 332; Kingl. Damm., Nat. 
Pflanz. 3,1 a. 28; Greene, Fl. Fran. 137. 
Most Europe to Siberia, Dahuria, China, Japan, Kurile 
Isls. and Saghalin; W. Himalayas; S. Africa. 
North America: Q., Ont. to Brit. Col. and Pac. S., E. 
of Sierras, to Mexico and E. to Atlantic. 
Minn. valley: Forest district and far N. W.; aquatic; 
floating in quiet waters. 
HERB.: Leonard 43, Crystal lake. 
Polygonum pensylvanicum Linn. Spec. 361 (17538). 
P. scabrum Morncu, Suppl. 267 (1802). 
?P. bicorne Ra¥F. FI. Lud. 29 (1817), 
Wats. and Coult., Gray’s Man. 6 ed. 440; Britt., Fl. N. J. 208; Upham, 
Fl, Minn. 119; Webb., Fl. Neb. 112; Coult., Fl. Colo. 319; Chap., Fl. S. St. 
388; Wats., Fl. Calif. IT, 13; Mac., Fl. Can. I, 409. 
North America: N. S., N. Br., Q., Ont. to Minn., 
Dak., Neb., Colo. and Sonora, Calif.; E. to N. Eng. and N. J.; 
S. to Ga. and Ark. 
Minn. valley: Throughout; moist soil, river banks, 
barren shores of lakes and sloughs. 
HERB.: Sheldon 1047, Sleepy Eye; Taylor 829, Glen- 
wood; Ballard 613, Chaska; Ballard 622, Chaska; Ballard 848, 
Patterson lake, Carver Co.; Ballard 803, Goose lake, Carver 
Co.; Ballard 660, Waconia; Ballard 879, Waconia; Ballard 742, 
Waconia; Ballard 504, Prior’s lake, Scott Co.; Oestlund 156, 
Minneapolis; Sandberg 480, Cannon Falls; Huntington 13, Rock 
Co.; Herb. Sheld. 1675, Minneapolis; Herb. Wickersheim 111, 
Lake Park, Becker Co. 
Polygonum incarnatum ELL. Sk. I, 456 (1821). 
P. nodosum var. incarnatum GRAY, Man, 3 ed. 372 (1852). 
P. lapathifolium var. incarnatum WATS. and CouLT. Gray’s Man. 
6 ed. 440 (1890). 
Mac., Fl. Can. I, 409; Upham, Fl. Minn. 119; Britt., Fl. N. J. 209; 
Webb., Fl. Neb. 112; Chap., Fl. S. St. 388; Coult., Fl. Colo. 319; Mac., Fl. 
Can. II, 353; Led., Fl. Ross. III, 521; Nym., Fl. Eur., in var.; Hook., Fl. 
Gt. Brit. in var. 344; Cov., Fl. Ark. 216; Webb., Appx. Neb. 27. 
All Europe; N. Russia to Ural Siberia—in vars. 
North America: N. S., N. Br., Ont., L. Nipigon to 
Vancouver; S. to N. J. and 8S. Car.; W. to Minn., Dak., Neb., 
Ark., Mo. 
