1 60 Origin of the B^Htish Flora. 



Preglacial (Cromer Forest-bed) : — 



Beeston, in Norfolk ; Pakefield, in Suffolk. 



Also recorded from the Pine and Oak Zones of South 



Sweden and Gotland (Gunnar Andersson) ; from Klinge 



bei Cottbus in Prussia, Fahrenkrug in Holstein, and Honer- 



dingen in Hanover (Carl Weber). 



Najas graminea, Delile. 

 Interglacial : — 



West Wittering, Sussex. 



A widely dispersed Tropical species, which extends into 

 the Mediterranean region, and occurs as an accidental 

 introduction into Britain in a canal which receives waste 

 hot water from a mill. As a fossil it has only been 

 recorded at West Wittering. 



Najas minor, Allione. 

 Interglacial : — 



West Wittering, Sussex. 

 Preglacial (Cromer Forest-bed) : — 



Pakefield, Suffolk. 



A plant of the Mediterranean region, and of central 

 Europe as far north as the Rhine ; it is unknown living in 

 the north or in Britain. 



Eleocharis acicularis, Sm. 

 Roman Period : — 



Silchester, Hampshire. 

 Interglacial : — 



Hoxne, Suffolk (bed D); West Wittering, Sussex; 

 Stone, Hampshire. 



