Polygonum.} POLTGONACEiE. 255 



3. P. amphibium (Linn.) — Water Bistort. 

 Districts 123456789 10 11 12 

 Lat. 5l°-56°. Throughout Ireland. 

 Type in Great Britain, British. 



Rivers, lakes, &c., or on damp ground ; frequent. Fl. July 

 to September, 



4. P. lapathifolimn (Linn.) — Glandular Persicaria. 



Districts 12-45--89-1112 

 Lat. 51°-56°. From South to North of Ireland. 

 Type in Great Britain, British, inclining to English. 



Fields and waste places ,- probably not unfrequent. Fl. 

 July to September. 



Far less common than P. Persicaria, but has no doubt been 

 overlooked in many places. 



Var. jS nodosum. (P. nodosum Pers.) (P. laxum Reich.) 

 Ballincollig Castle, near Cork,; J. C. Near Belfast, in 

 various places ; Flor. Belf. Mr. Stewart has sent us, under 

 the name of P. nodosum, some specimens, . gathered near 

 Belfast, which we can "hardly distinguish from P. lapathifolium, 

 which latter is not included in Mr. Tate's " Flora Belfastiensis." 

 Mr. Carroll's specimen seems also to belong to P. lapathi- 

 folium, 



5. P. Persicaria (Linn.) — Spotted Persicaria. 



Districts 123456789 10 11 12 

 Lat. 51°-56°. Throughout Ireland. 

 Type in Great Britain, British. 



Waste and damp ground ; common. Fl. July to September. 



6. P. Hydcopiper (Linn.) — Biting Persicaria. 

 Districts 123456789 10 11 12 

 Lat. 51°-56°. Throughout Ireland. 

 Type in Great Britain, British. 



"Watery places and damp waste ground ; common. Fl. 

 August, September. 



