CEUCIFERJE. 9 



4. N. sylvestre. Br. (Creeping Yellow Cress.) 



Watery places. 6-8. 



Rare. Wet ground at Ruislip, Eastcott ; Moss Lane, 

 Pinner. (Flor. Midd.) 



ARMORACIA. (Horse Radish.) 



i. A. rusticana.* Baumg. (Common Horse Radish.) 



Waste ground, near water. 5, 6. 



Grove pond, Harrow, waste ground by Peterborough 

 Road, and by the side of a stream at Alperton ; chalk pit, 

 Pinner, Stanmore Heath. (Flor. Midd.) 



DRABA. (Whitlow Grass.) 



I. D. verna. L. (Common Whitlow Grass.) 

 ' Walls and dry banks. 3-5. 



Dry pastures at Horsington ; Woodhall, Pinner. Stan- 

 more. (Flor. Midd.) 



HESPERIS. (Dame's Violet.) 



I. H. matronalis.* L. (Common Dame's Violet.) 

 Pastures and woods, always escaped from cultivation. 



5-7. 



Near Harrow Weald (Ed. i.) May 24th, 1863 ; the 



Parsonage, Pinner : first appeared in 1867. 



SISYMBRIUM. (Hedge Mustard.) 



1. S. officinale. Scop. (Common Hedge Mustard.) 

 Waste places and by way sides. 6, 7. 

 Everywhere abundant. 



2. S. thalianum. Hook. (Common Thale Cress.) 

 Dry banks. 4-7. 



