94 FLORA OF THE EAST RIDING OF YORKSHIRE. 



in marshy ground by River Hull, near Arram, where it 

 was discovered by the author, 7th July, 1900.* Its com- 

 panions in the marsh were Lysimacliia vulgaris^ Carex 

 paradoxa, Calamagrostis lanceolata, and Lastrcea Thelypteris. 



417. Lathyrus montanus. Bemli., 107. 



(Tuberous Bitter Vetch). 



Native, Brit., 4, 6, July, III. 



Not common. Risby Park,* and near Howden (J.B.). 



ROSACE.E. 



419. Prunus spinosa. Linn., io8. 



(Blackthorn, Sloe). 



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



Very common. 



420. P. insititia. Huds., 65. 



(Bullace). 

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



Fairly frequent near Stoneferry and Swine. 



421. P. domestica. Linn. 

 (Wild Plum, Fruit, E.R.D. " Hoss-g-ogs "). 



Denizen, Brit., 1-7'. May, II. 



Frequent in hedges near villages. 



422. P. Avium. Linn., 97. 

 (Wild Cherry or Gean). 



Denizen, Eng., 3, 4. May, II. 



Copses and woods on Wolds, as near South Cave. 



423. P. CerasuS. Linn., 33. 



(Cherry). 

 Denizen, Eng., 1-7. May, II. 



Near villages ; escape. 



