302 BAKERS NORTH YORKSHIRE. 



Ceratophyllum demersum L. English type. Native. 

 Area i. Range 50. In the Foss near York, and with Ana- 

 charis in the Foss Island ditches. C. siibmersum is reported by 

 Archdeacon Peirson from ponds at Newburgh. 



Lythrum Salicaria L. English type. Native. Area 

 general. Range 0-250. Frequent in watery places in the low 

 country, ascending in the Yore district to Semmer Water. 



Peplis Portula L. British type. Native. Area 987.4 

 321. Range 0-400. Ponds upon heaths, not unfrequent. In 

 Teesdale at Upper Cronkley and in Swaledale on Downholme 

 Moor. In Wensleydale by the Yore about Aysgarth Falls ; J. 

 Percival. About Pilmoor, Stockton Forest, and Strensall 

 Common. In the Howardian tract in several places. Amongst 

 the eastern hills at Randaymere near Sleights and on Scawton 

 Moor. Abundant in the hollow west of Gormire, 1886. 



Bryonia dioica L. English type. Native. Area general. 

 Range o-ioo. Hedges in the low country, not by any means a 

 common plant, but yet noted in all the nine districts. 



Montia fontana L. British type. Native. Area general. 

 Range 0-750. Frequent in streams and damp places, especially 

 amongst the hills. It ascends to the ridge betv,'een the peak of 

 Nine Standards Rigg and the source of the Swale, and to the 

 springs which issue from the Main Limestone of Mickle Fell. 



Claytonia perfoliata Don. Alien. Sandy field at Acomb ; 

 F. A. Lees. 



Scleranthus annuus L. British type. Native. Area 

 8.6.3 2 I. Range o-ioo. Not unfrequent in sandy fields in 

 the low country. 



Berberis vulgaris L. English type. Native. Area 

 general. Range 0-200. Frequent in hedges and thickets in 

 the low country, and occasionally amongst the hills. 



Epimedium alpinum L. Alien. Subspontaneous or 

 planted in Kildale Woods ; W. Mudd ! A native of Austria 

 and Italy. 



