242 POLTGONACE^. 



Meadows and pastures ; very common. P. May — July. 



Throughout all the districts, but less common in II. and III. 

 VII. Forms a considera.ble proportion of the hay made in the northern out- 

 skirts of town, but few meadows are now left in this district. Tot- 

 tenham ; Cherry. Hammersmith ; il/i^rm (v. «.). Grosvenor Square ; 

 Warren. Bet. Hornsey Wood and Hornsey. Highgate. Hamp- 

 stead. Kilburn. Primrose Hill. Garden of Lincoln's Inn. Con- 

 stitution Hill, Grreen Park. 



First record: 5ZacX^s?;o«e, 1737. , 



684i. R. Acetosella, L. Sheep^s Sorrel. 



Acetosa arvensis lanceolata, C. B. P. (Blackst.). 

 Cyb. Br. ii. 349. Curt. F. L. f. 5. 



Heaths, dry pastures, and roadsides ; common. P. May— August. 

 I. Harefield ! ; Blackst. Fasc. 2. Harrow Weald ! and Kuislip Com- 

 mons ; Melv. 67. Stanmore Heath. Near Elstree Keservoir. Near 

 Potter's Bar. 

 II. Staines. Near Sipson. 



III. Hounslow Heath ; Drilling Ground, &c. Allotments, Twickenham, 



very luxuriant. 



IV. North Heath, Hampstead. Green Hill, Pinner Drive, Peterboro' 



Koad ; Melv. 67. 

 V. Near Ealing ! ; Newb. HanweU ; Warren. Horsington Hill. Kew 



Bridge Ky. Station. 

 VI. Hadley ! ; Warren. Colney Hatch. Edmonton. 



VII. Hyde Park, in ditch by Kensington Gardens, 1868; Warren {v. s.). 

 South Heath, Hampstead. Parson's Green. Gardens of Lincoln's 

 Inn, 1869. Grosvenor Square, 1869. 

 First record: Blackstone, 1737. Confined to poor sandy or gravelly 



soils. 



POLYGONUM, Linn. 



585. P. Blstorta, L. Snake Weed. Bistort. 



Bistorta major, Ger. (Blackst.). 



Cyb. Br. ii. 332. Curt. F. L. f. 1 (probably from a Hampstead specimen). 

 Moist meadows and woods ; rather rare. P. June — September. 

 I. In the meadows near Uxbridge; Blackst. Fasc. 10 and Light/. MSS. 

 Terrilands, Pinner; Hind. Fi^ld near Ruislip Reservoir. 



III. On the inner slope of the moat, Headstone Farm ; Melv. 66. 



IV. Plentifully in a meadow by the side of Bishop's Wood, near Hamp- 



stead ! ; Curt. F. L. It is now almost eradicated from the meadow, 

 but grows on the bank at the border of the wood, and extends a 

 little way into the latter. Hampstead Common, 1809 ; Winch MSS. 

 Meadows bet. Mill Hill and Elstree ; Lond. Flora, 123. 

 VI. Top of Muswell HiH, J. Woods ; B. G. 404. Field at Muswell HiD, 

 1867 ; Cherry (v. s.). Near Warren Lodge, Edmonton. 

 VII. Ken Wood ! ; Park Hampst. 30. 

 First record: Blackstone, 1737. 



