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, Potonié, and myself 
as Paradoxocarpus (or Folliculites) carinatus have since 
been shown to belong to Stratéotes 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. 
