ROSACES. 29 



6. V. tetrasperma. Moench. (Slender Tare.) 



Hedges, gravelly places. 6-8. 



Pinner Drive and Railway Embankment. Roxeth; 

 Pinner. Horsington Hill. (Flor. Midd.) 



LATHYR'US. ( Vetchling, Everlasting Pea.) 



1. L. Nissolia. L. (Crimson Vetchling, or Grass 



Vetch.) 



Bushy places. 5, 6. 



Rare. Sparingly at Kenton Brook, and plentiful in a 

 hedgerow near Kenton. (F. W. Longman.) Alperton 

 and Sudbury. , 



2. L. pratensis. L. (Meadow Vetchling.) 

 Moist meadows and pastures. 7, 8. 



Very common throughout the district. 



3. Lr. macrorrhizus. Wimm. (Tuberous Bitter Vetch.) 

 Thickets and pastures. 



Ruislip, near the Reservoir ; Harrow, Railway Embank- 

 ment. The variety L. tenui/olius found in woods at Pinner. 

 This plant is the Orobus tuberosus of Linnaeus. 



ORDER XXVII. ROSACES. (ROSE TRIBE.) 

 PRUNUS. (Plum and Cherry.) 



I. P. communis. Huds. (Common Plum, Sloe, or 



Blackthorn.) 

 Hedges and woods. 4, 5. 



a. P. spinosa. L. (Sloe, or Blackthorn.) 

 Branches well armed with spines. 

 D 2 



