Former Distribution of British Plants. 167 



Carex rostrata, Stokes. 

 Neolithic : — 



Cowden Glen, Renfrewshire. 



Interglacial : — 



West Wittering, Sussex; Stone, Hampshire; Southelm- 

 ham, Suffolk ; Hoxne, Suffolk (bed D) (?) ; Airdrie, Lanark. 



Carex vesicaria, L. 



Unknown fossil in Britain. 



Recorded from the Pine and Oak Zones in Sweden 

 (Gunnar Andersson). 



Phragmites communis, Trin. 

 Neolithic : — 



Thames Valley (common) ; Barry Docks, Glamorgan ; 

 Kelsey Hill, Yorkshire. 



Interglacial : — 



Stone, Hants ; West Wittering, Sussex ; Kirmington , 

 Lincolnshire. 



Preglacial (Cromer Forest-bed) : — 

 Common nearly everywhere. 



Stems, leaves, or nodes of grass are common at most 

 localities ; but the only species in a determinable state 

 appears to be Phragmites communis. Anthroxanthum' 

 odoratum, Holus lanatus^ Poa trivialis, and Hordeum 

 distichum have all been recorded ; but in each case I think 

 that the specimens are recent and do not belong to the 

 deposit in which they are said to occur. Extreme care 

 is needed to prevent the introduction of grass-seeds, which 

 are dispersed by the wind and adhere to the surface of 

 the clays containing the fossil plants. 



