FLORA OF THE EAST RIDING OF YORKSHIRE. 05 



79. Cheiranthus Clieiri. Linn. 



(Wallflower). 

 Denizen. June, III. 



Old Walls, Beverlej-.* Howden Church walls.* 



80. Nasturtium officinale. R.Br., 112. 



(Common Watercress). 

 Native, Brit., 1-7. June, II. 



Very common in all dykes and shallow watery places. 

 Var. siifolium, Reichb., near Cottingham. 



81. Nasturtium sylvestre. R.Br., 63. 



Native, Eng. , i, 2, 6, 7. July, IV. 



Not infrequent between Beverley and Hull (B.). Howden 

 (J.B.). Barlby (W.N.C.). 



82. Nasturtium palustre. DC, 84. 



(Marsh Yellow Cress). 

 Native, Eng. , i, 2, 6, 7. June, II. 



Frequent. Skipsea in Holderness,* near Skipwith 

 (W.N.C.), and Howden (J.B.). 



83. Nasturtium amphibium. R.Br., 46. 



Native, Eng-., i, 2, 5, 7. June, HI. 



Common in Holderness dykes, near Dunswell, Lambwath 

 Stream, and Sutton. Var. variifolium, DC, Fulford Ings 

 and Stamford Bridge, 1866 (W.W.). 



84. Barbarea vulgaris. R.Br., 97. 



(Yellow Rocket). 

 Native, Brit., 1-7. July. I- 



Frequent near drains, Hull and Cottingham.* Banks of 

 the Ouse (W.N.C.). Near Howden (J.B.). 



88. Barbarea proecox. R.Br. 

 Casual. 

 In cornfields on Wolds. Driffield (M.H.).* 



