baker's north YORKSHIRE. 



resembling the Wiske in character, although considerably larger 

 in size. The Wiske, the Foss, and the Derwent in its course 

 through the Vale of Pickering, are the only typical valley streams 

 which we have in North Yorkshire, and it is about these that 

 the Hygrophilous plants principally cluster. The following are 

 the rarer plants of what are called the Foss Islands, a small piece 

 of boggy ground which is intersected by ditches, near the 

 junction of the stream with the Ouse, and of the banks of the 

 stream and its channel in the neighbourhood of York. 

 NymphcEci alba 



Nastiirthim sylvestre 

 Cerastium aquatinim 

 Myriophylhivi verticillatinii 

 Ceratophylliim demersum 

 Chenopodimn urbicuni 

 Polygonum minus 



„ viite 



Rumex palustris Physcoinitrella patens. 



A large portion of the city of York is included in the angle 

 between the Foss and the Ouse. The following are the rarer 

 plants of the suburb of Clifton, and the fertile sandy alluvial 

 meadows which margin the Ouse on the north-west of the city : 



Sagittaria sagitiifolia 

 Butomus umbel! at us 

 Fotamogeton compressus 



,, lucens 



Lemna gibba 



,, polyrrhiza 

 Spaiganium miniimim 



Fumaria Borcei 

 Barbarea stricta 



„ sylvestris 

 Nasturtmm sylvestre 

 Saponaria officitialis 

 Cerastium aquaticum 

 Epilobium 7-oseum 

 Chenopodium olidum 

 „ urbicum 



,, murale 



Atriplex deltoidea 

 Rumex aquaticus 

 Orchis pyramidalis 



Orchis ustulata 

 Colchicum autumnale 

 Fotamogeton flabellatus 

 Carex pseudo-cyperus 

 Alopecurus bulbosus 



Fottia Starkeana 

 Barbula latifolia 

 Orthotrichu?n palletis 

 „ Sprucei 



,, pimiiluin 



Myrifiia pulvinata 

 Scleropodium ccBspitosutn. 



This district has the smallest flora of the nine. The Montane 

 and Xerophilous category are in it but nominally represented, 

 and the Maritime category not at all. In the low grounds the 

 Hygrophilous category is well represented. The clayey soils 



