POLTGONACEiE. 245 



V. [Acton G-reen ; Newb.] 

 VII. First detected by Prof. La Gasca of Madrid by the roadside at Chelsea, 

 where ... we have recently (1843) observed it; Babington in E. B. 

 Stipp. Eoadside near Edgware Road Station, Kilburn ; Warren. 

 Osier holt by the river, Sandy End, 1867. 

 First record : La Gasca, 1826 ; also first as a British plant. 



591. P. Hydropiper, L. Water Pepper. 

 Persicaria wrens sive Hydropiper, C. B. P. (Blackst.). 

 Cyb. Br. ii. 336. Curt. F. L. f. 1. 



Sides of ditches and streams ; common. A. August — October. 

 I. Harefield ! ; Blackst. Fasc. 76. Near Potter's Bar. 

 II. Hampton. Bushey Park. Bet. Hampton Court and Kingston Bridge. 



III. About Twickenham in many places. 



IV. Hampstead ; Irv. MS8. Harrow district, very frequent ; Melv. 66. 

 V. Perivale ; Lees. Sion Park. Heston. 



VI. Bet. Tottenham and Edmonton. Edmonton. 

 VII. [TothiU Fields ; Smith MSS.] Hyde Park ! ; Herb. G. # B. Osier 

 holt, Sandy End. South Heath, Hampstead. Kentish Town. 

 Hackney Wick. 

 First record: Blackstone, 1737. 



592. P. minus, Huds. 



Persicaria angustifol. ex sing, genie, florens, and Persicaria pusilla repens 

 (Pet.). Pers. minor (Budd.). Pers. iuterntpia (Gray). P. Hydro- 

 piper, var. P (Huds.). 

 Cyb. Br. ii. 337; iii. 601. Curt. F. L. f. 1 (drawn from a Middlesex 



specimen). 

 Marshy places ; rare. A. August, September. 

 II. Bushey Park, at the south corner of the first pond, 1867. 

 IV. Golder's Green, Hampstead ; Irv. Lond. Fl. 

 VI. Finchley Common, L. W. Dillwyn ; B. G. 404. 



Vn. [Ditchbanks in the meadows beyond Lord Peterborough's house at 

 "Westminster; Pet. Mus. i. p. 13. TothiU Fields; Pet. Midd., 

 Blackst. Spec. 70, Huds. ii. 171. Ibid., in the greatest abundance ; 

 Curt. F. L.'\ Near London, A. H. Haworth ; Gray, ii. 732. Eel- 

 brook Meadow, Parson's Green, 1864.* 

 First record : Petiver, 1695 ; also the first as a British species ? Figured 

 in Pet. H. B. Cat. iii. fig. 6. 



593. P. avlculare, L. Knot-grass. 

 P. mas vulgare, Ger. em. (Blackst.). 



Cyb. Br. ii. 337. Curt. F. L. f. 1. Syme E. B. viii. tt. 1229-1231. 



* Key. W. W. Newbonld thinks Mr. Irvine showed it to him there so lately as 1867. 

 We, however, failed to find it in that year, the meadow having become very dry after 

 drainage. 



