no Origin of the British Flora, 



Arenaria peploides, L. 

 Interglacial : — 



Stone, Hampshire. 



Spergula arvensis, L. 

 Neolithic : — 



Redhall, near Edinburgh. 



Montia fontana, L. 



Neolithic : — 



Fillyside, near Edinburgh (raised beach) ; lacustrine 

 deposits of the Scottish Lowlands, Redhall, Hailes 

 Broughton, near Edinburgh; Cowden Glen, Renfrewshire. 



Late Glacial : — 



Twickenham, Middlesex; Hoxne, Suffolk (bed C). 



Interglacial : — 



Hitchin, Hertfordshire; Hoxne, Suffolk (bed D); Allen- 

 ton, near Derby; West Wittering, Sussex. 



Hypericum perforatum, L. 

 Roman Period : — 



Silchester, Hampshire. 



Interglacial : — 



West Wittering, Sussex. 



Hypericum quadrangulum, L. 

 Neolithic (?) — 



Redhall, near Edinburgh. 



Interglacial: — 



West Wittering, Sussex. 



Preglacial (Cromer Forest-bed) : — 

 Pakefield. Suffolk. 



