Former Distribution of British Plants. 153 



peared from the southern half of England ; though, when 

 re-introduced, it flourishes and spreads rapidly from 

 seedlings. 



Stratiotes aloides, L. 

 Interglacial : — 



Southelmham, Suffolk. 



Preglacial (Cromer Forest-bed) : — 



Beeston, Sidestrand (in Norfolk) ; Corton (in Suffolk). 



The fruits described by Nehring, Potonie, and myself 

 as Paradoxocarpus (or Folliculites) carinatus have since 

 been shown to belong to Stratiotes aloides. They occur 

 abundantly at Klinge bei Cottbus, in Prussia, and at 

 Fahrenkrug in Holstein. 



Iris Pseudacorus, L. 

 Neolithic : — 



Crossness, Essex (upper peat) ; Elie, Fife. 



SPARGANIUM RAMOSUM, Curtis. 

 Neolithic : — 



Barry Docks, Glamorgan ; Crossness, Essex (upper and 

 lower peats); Tilbury, Essex; Redhall, near Edinburgh. 



Late Glacial : — 



Hoxne, Suffolk .bed C) ; Garvel Park (Clyde Beds) 

 (two very small and doubtful carpels). 



Interglacial : — 



West Wittering, Sussex; Hitchin, Hertfordshire; 

 Hoxne, Suffolk (beds D and E). 



Preglacial (Cromer Forest-bed) : — 



Beeston, Norfolk ; Pakefield, Suffolk ; Corton, Suffolk. 



