: 34 CRUCIFEE^. 



so. S, ttaalianum, Gaud. Arabis thaliana, L. (Syme £. £.). 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. Ruislip. Bet. Uxbridge and Hil- 

 lingdon ; Cole. 

 II. Staines, in many places. Road from Sunbury to Walton Bridge. 

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

 IV. Hampstead Heath; Irv. MSS., and Co(yper, 99. Hedgebank bet. 



Bishop's Wood and Finchley ; Dames. 

 V. Turnham Green. Chi swick, 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. 



ALLIABIA, Adans. 



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



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

 ■. Alliaria, Mattk. (Johns.). 



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

 Hedges ; very common. B. May, June. 



Generally 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, Linn. 



52. S. cbeiranthoides, 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. Riverside, Staines, 1841 ; Herb. Young. Gravel bed of Thames, 

 shortly below Hampton CourtBridge, Watson ; iV«w 5. (t. 588. West 

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

 Many places about Staines. 



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



MelviU, 9. 



IV. Brick field. Burgess Hill. 



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



