106 Origin of the British Flora. 



NYMPHyEA ALBA, L. 

 Recent Alluvium (?): — 



Happisburgh, Norfolk ; Weymouth. 

 Interglacial: — 



West Wittering. Also at Griinenthal and Fahrenkrug, 

 in Holstein, and Klinge bei Cottbus, Prussia, associated 

 with Brasenia, &c. (C.Weber) ; at Honerdingen in Hanover 

 (C.Weber); and in Sweden in the Birch, Pine, Oak, and 

 Spruce Zones (Neolithic) (Gunnar Andersson). 



The exact date of the Alluvium at Happisburgh and 

 at Lodmoor, near Weymouth, cannot be fixed. 



Brasenia purpurea, Mich. 



This species, though found in Africa, Asia, Australia, 

 and America, is unknown living in Europe. 



It occurs in the fossil state in Russia, Denmark, 

 Germany, and Switzerland (Gunnar Andersson) ; but has 

 not yet been found in Britain. 



PAPAVER SOMN1FERUM, L. 

 Neolithic (?)— 



Cowden Glen, Renfrewshire. 



The Opium Poppy was cultivated in Neolithic times, 

 and its seeds have been found in the Swiss Lake-dwellings. 

 The deposit at Cowden Glen is considered by Professor 

 James Geikie to be of Interglacial age; but the occurrence 

 in it of Papaver somniferum suggests a more modern date. 



Papaver Argemone, L. 

 Roman Period : — 



Silchester, Hampshire. 



