106 Origin of the British Flora. 
NYMPHAEA 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 SOMNIFERUM, 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. 
