132 FLORA OF THE EAST RIDING OF YORKSHIRE. 



860. Cnicus palustris. Willd., 112. 



(Marsh Thistle). 

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



Frequent in wet places, but not nearly so common in the 

 East as in the more elevated Ridings. 



862. C. pratensis. Wilid., 49. 



(Meadow Plume Thistle). 



Native, Eng., 2, 6. J"!)'- 



Rare. Near Hull (B.). Staddlethorpe (C.W.).* 



866. C. arvensis. Hoffm., 112. 



(Creeping Cornfield Thistle). 



Native, Brit., 1-7. 



Too common ; the Nemesis of the bad farmer. Var. 

 d. setosus (Bess.) is very abundant on the dock wastes, 

 Hull.* Var. vestitus, Koch, from the same locality, is for 

 the first time recognised by Mr. S. T. Dunn and W.W. as 

 of British growth. 



867. Onopordon Acanthium. Lijiu., 60. 



Alien. 



Rare. Amongst the aliens of the Hull docks. Mr. Saml. 

 Mason gathered it in igoi,'-' and young plants are growing 

 there now. May, 1902. 



868. Mariana lactea. Hill. 

 (Milk-veined Thistle). 



Denizen, Eng., 4, 5. Jul}'' ^^• 



Near villages ; an escape. Rillington (B.). Little 

 Weigh ton.* 



870. Serratula tinctoria. Linn., 64. 



(Saw-wort). 

 Native, Eng., 6. Aug., II. 



Near Market Weighton (J.J.M.). the only record.* 



