40 CRUCIFERiE. 



Kingsland, Ger. 187.] Banks of the Lea; Forster, Herh. Brit. Mus. 

 Isle of Dogs ! ; Newb. Sandy End, Fulham. Hackney Wick. 



First record : Gerarde, 1597 ; also first notice in Britain. No doubt 

 derived from neighbouring gardens. It is very persistent in ground 

 where it has once been introduced, and must be considered thoroughly 

 established in Middlesex, though it does not prodxice seed. 



62. A. amphibia, Koch, Nasturtium amph., B. Br. (Syme). 

 Great Water Radish. 



Raphanus aquaticus, (Ger.). Sisymhrivm amphibium, L. (Sm.) 



Cyb. Br. i. 149; Comp. 101. Syme E. B. i. t. 128. 



Sides of rivers, streams, and ditches ; rather common. P. June — 

 September. 



I. Colne, at Harefield !, and at Yewsley ! ; Newb. 



II. Staines Common. Common by the Thames at Sunbury, Walton 



Bridge, Halliford, Hampton, Hampton Court, Kingston Bridge and 



Teddington. 

 III. By the river at Twickenham. By the Cran on Hounslow Heath and 



other parts of its course. Duke's River, Isleworth. 

 V. Continues down the course of the Thames at Brentford, Strand-on-the- 



Green, and Chiswick. Canal at Greenford ; Melvill, 7. Twyford! ; 



Newb. Hanwell ! ; Cherry. 

 VII. Bishop's Walk, Fulham ; Britten. River bank at Cremorne. [In the 



chinks of a stone wall upon the river Thames by the Savoy in 



London ; Ger. 1 86.] Brick wall of a house fronting the river (now the 



embankment) at bottom of Surrey Street, Strand, 1867- Isle of Dogs, 



IS17 ; Herb. G. and R. [Westbourne Green, 1827— 30; Varenne.] 



Hackney Marshes. 



First record: Gerarde, 1597; also first as a British plant. A common 

 species by the Thames, and by most of the streams flowing into it. 



THLASPI, L. 



63. *T. arvense, Linn. Penny Cress, 



Cyb. Br. i. 117 ; iii. 380 ; Comp. 93." Curt. F. L. f. 6. 



Waste places and roadsides ; rather rare. A. June — September. 

 I. A single plant in a garden at Harefield ! ; Newb. 



II. Isolated plants at Hampton Station, and near Kingston Bridge. 



III. Single specimens in several places about Twickenham ; in plenty near 



Twickenham Ry. Station. Field near Hounslow ; Newb. 



IV. Near the Spaniards, Hampstead, a few specimens ; Curt. F. L. 

 V. In a field bet. Acton and Turnham Green ! ; Newb. 



VII. [Tothill fields ;] bet. Tottenham and Newington, J. Woods ; B, G. 407. 

 Newington Common, about 50 plants, 1865 ; Grugeooi {v.s.). Chel- 

 sea ; Britten. Prince Albert Road, S. Kensington, plentiful in 1855, 



