38 



entirely on the Oxford Clay. There are two isolated patches of 

 other formations in it, but both of very trifling extent, one of 

 Cornbrash, the other of sands belonging to the Calcareous Grit. 

 Comparing the plants found here with those of the county 

 generally, I obtain the following results: Of the 289 plants 

 described as " generally distributed," the following, so far as I 

 know at present, are wanting : 



Fumaria officinalis. 

 Helianthemum vulgare. 

 Scleranthus annuus. 

 Geranium rotundifolium. 

 5 Prunus domestica. 

 Poterium Sanguisorba. 

 Epilobium palustre. 

 Callitriche etagnalis (platycarpa). 



,, hamulata. 

 10 Petroselinum segetum. 

 Pastinaca sativa. 

 Centaurea Scabiosa. 



,, Cyanus. 

 Matricaria Chamoniilla. 

 15 Filago Germanica. 

 Senecio Jacobeea. 

 Leontodon hirtus. 

 Campanula rotundifolia. 

 Atriplex Smithii. 

 20 Kumex nemorosus v. viridis. 



,, Hydrolapathum. 

 Polygonum amphibiuni. 

 Scirpus palustris. 

 Eriophorum angustifolium. 

 25 Car ex vulgaris. 

 ,, paludosa. 

 Holcus mollis. 

 Poa nemoralis. 

 ,, compressa. 

 30 Festuca elatior. 

 The absence of some of these is remarkable ; but in the case 



