1 87 
of the Recent Flora of Britain. 
Prunus padus, Linn. 
A few stones. Postglacial, Hornsea and Sand le Meer, in 
East Yorkshire. Interglacial, Hailes, near Edinburgh, and 
Airdrie. 
RUBUS IDALus, Linn. 
Stones (often split by birds or rodents). Postglacial, Clyde 
beds at Black Burn, East Tarbet (from Mr. Robertson), and 
Garvel Park near Greenock (from Mr. Scott). ‘ Submerged 
Forest,’ Southampton Docks (from Mr. Whitaker). Old 
lacustrine deposit, Hoxne in Suffolk (C. R. and H. N. Ridley). 
Interglacial beds, Redhall (abundant) and Hailes (rare), (from 
Mr. Bennie). 
Rubus fruticosus, Linn. 
One stone at each locality. Interglacial, Hailes, near 
Edinburgh. Preglacial (Cromer Forest-bed), Pakefield, and 
Mundesley. 
POTENTILLA TORMENTILLA ? Neck. 
One stone. Postglacial (Clyde beds), Roxburgh Street, 
Greenock. 
POTENTILLA COMARUM, Linn. 
Achenes retaining their white colour. Interglacial, Redhall 
(common), and Airdrie. 
POTERIUM OFFICINALE, Hook. 
One well-preserved fruit at each locality. Preglacial 
(Cromer Forest-bed), Mundesley, and Sidestrand. 
[Crataegus oxyacantha, Linn.] 
Recorded by Hugh Miller from postglacial brick-clay of 
Portobello. I have not been able to examine the specimen 
(said to be wood), and cannot find any trace of the hawthorn 
elsewhere. The fruits of the hawthorn are so hard, and are 
scattered so widely by birds, that it is difficult to understand 
its absence from prehistoric deposits, or at any rate its great 
scarcity, if the tree is really native. 
