34 cruciferj:. 



so. S. thalianum, Gaud. Arabis thaliana, L. (Syme E. B.). Wall 

 Cress. Thale Cress. 

 Pilosella siliquata (Merrett). P. siliquata Thalii (Blackst.). 

 Cyb. Br. i. 140; iii. 383 ; Comp. 99. Syme E. B. i. t. 115. 



Walls and dry ground ; common. A. May, June. 

 I. Harefield ! ; Blackst. Fasc. 77. Euislip. Bet. Uxbridge and Hil- 

 lingdon ; Cole. 

 II. Staines, in many places. Eoad from Stmbury to "Walton Bridge. 

 III. Farmyard wall. Headstone. Isleworth. Heston. Hounslow Heath. 

 IV. Hampstead Heath ; Irv. MSS., and Cooper, 99. Hedgebank bet. 



Bishop's Wood and Finchley ; Davies. 

 V. Turnham Green. Chiswick, field by the river. Osterley Park walls ; 



Masters. Hanwell ! ; Newb. Acton ; Tucker. 

 VI. Colney Hatch. Edmonton. Enfield. 



VII. [On the ditch sides in the way to Marybone ; and in a close on the 

 left hand of the lane from Islington to Kingsland ; Merrett, 93.] 



First record: Merrett, 1666. 



ALIIAEIA, Adans. 



51. A. officinalis, Andrz. Sisymbrium Alliaria, Scop. (Syme E. B.). 



Erysimum Alliaria, L. (L. Cat.). Jack-by -the- Hedge. Sauce-alone. 

 Alliaria, Matth. (Johns.). 



Cyb. Br. i. 154 ; Comp. 102. Syme E. B. i. t. 100. 

 Hedges ; very common. B. May, June. 



Grenerally distributed throughout the county, and usually abundant. 

 VII. Occurs in many of the northern suburbs, as Blackstock Lane, Green 

 Lanes, Highgate, &c. 

 First record: Johnson, 1629. 



ERYSIMUM, Linoi. 



52. E. ctaeirantboides, L. Worm-seed. 



Cyb. Br. i. 152 ; iii. 384 ; Comp. 102. Syme E. B. i. t. 102. 



On river-banks, a weed in garden ground, also on rubbish, and in waste 



land ; common. A. or B. June — September. 

 I. Banks of Colne, near Harefield Mill; Fl. Herts, 27. 

 II. Kiverside, Staines, 1841 ; Herb. Young. Gravel bed of Thames, 

 shortly below Hampton Court Bridge, Watson ; iVew^. G^. 588. West 

 Drayton ! ; Newb. Teddington, abundant. Hampton, abundant. 

 Many places about Staines. 



III. About Twickenham, abundant. Cornfields at Wood End, Hind; 



Melvill, 9. 



IV. Brick field. Burgess Hill. 



V. Shepherd's Bush ; Acton ; Turnham Green ! ; Newb. 



