298 63. POLYGONACE. 
931. Polygonum Bistorta, Linn. 
Provinces 1 to 17 (18). Native; but introduced to many counties. 
Lat. 50—58. Cornwall, Dorset, Kent. — Skye, Ross. 
Zones 123. Tyne to 350 yards. Humber to 300 yards. 
Census 17 ? ? Ireland 8.  British-intermediate type. 
Europe spa ita tur aus ger fra cha net (den) got - (swe). 
Russia 6- 4821. West-asia. Himalaya. Siberia. Kamtsc. 
— Iceland ; Hooker list, from Zoega. Am.? Col.? A var. there? 
932. Polygonum viviparum, Linn. 
Provinces ---- [5] - 7 [8] -101112--15 161718. Native. 
Lat. 53—61. Carnarvon, York. — Orkney, Shetland. 
Zones- ? 3456. Highl. 20—1310 y. Humber 200—450 y. 
Census 8 13 27. Ireland 1. Highland type of distribution. 
Europe spa ita tur aus ger fra - - - got nor swe lap fin. 
Russia 6--321. Himalaya. Siberia. Kamtsc. Spitsbergen. 
— Faroe. Iceland. Greenland. America. Columbia. 
933. Polygonum amphibium, Linn. 
Provinces all. Native. 
Lat. 50—61. Cornwall, Wight, kent. — Orkney, Shetland. 
Zones 12 8. Humber to 250 yards. Tyne to 150 yards. 
Census 18 88 94. Ireland 12. British type of distribution. 
Europe all, except Finmark. 
Russia 654321. West-asia. India. Siberia. Dav. China. 
Algeria. — Iceland. America. Columbia. 
934 (935). Polygonum lapathifolium, Linn. 
Provinces 1 to 17. Native. P. laxum (of Eng. auth.) included. 
Lat. 50—58. Cornwall, Wight, Kent. — Isla, Elgin. 
Zones 128. Humber to 300 yards. Lakes to 250 yards. 
Census 17 84 77. Ireland 8. British-english type. 
Europe all, except Finmark. 
Russia 65 432. India. Siberia. Davuria. 
Algeria. — (America, introduced). 
