9 6 



Origin of the British Flora. 



Eupatorium cannabinium. 

 Aster Tripolium. 

 Senecio aquaticus. 

 Cnicus lanceolatus. 



palustris. 



Lapsana communis. 

 Hieracium Pilosella. 

 Taraxacum (?). 

 Glaux maritima. 

 Menyanthes trifoliata. 

 Solarium Dulcamera. 

 Verbascum Thaspus. 

 Mentha aquatica. 

 Lycopus europaeus. 

 Stachys palustris. 

 Ajuga reptans. 

 Atriplex patula. 

 Polygonum Persicaria. 

 Rumex conglomeratus. 

 obtusifolius. 



cnspus. 



Mercurialis perennis. 

 Betula alba. 



Corylus Avellana. 

 Quercus Robur. 

 Salix cinerea. 

 Ceratophyllum demersum. 

 Sparganium ramosum. 

 Alisma Plantago. 

 Sagittaria sagittifolia. 

 Potamogeton natans. 



heterophyllus. 



lucens (?). 



densus. 



trichoides. 



Ruppia maritima. 

 Zannichellia pedunculata. 

 Najas minor. 



graminea. 



Eleocharis acicularis. 



palustris. 



Scirpus lacustris. 

 Carex muricata. 



distans. 



rostrata. 



riparia. 



Weymouth. 



(Gepp, ' Fossil Plant-remains in Peat,' Jo?im. Botany, 

 Vol. XXXIIL, pp. 180-182. 1895.) 



Cakes of compressed peat thrown up near Weymouth 

 have yielded a few plants, among which is the white water- 

 lily. The peat is apparently derived from the seaward edge 

 of Lodmoor, which lies to the north-east of Weymouth. 

 Its age is not earlier than Neolithic, and at present it is 

 impossible to say whether it may not be entirely Post- 

 Roman. 



Nymphaea alba. 

 Prunus Padus. 

 Myriophyllum spicatum. 

 Sambucus nigra. 

 Alnus glutinosa. 

 Ceratophyllum demersum. 

 Sparganium ramosum (?). 



Potamogeton natans. 



lucens. 



perfoliatus. 



Scirpus maritimus (?). 



Carex. 



Phragmites communis. 



Osmunda re^alis. 



