THE EAST SWALE DISTRICT. 



isig 



Sandstone the ferruginous crags, which are exposed at from 50 

 to 100 feet below it, at the summit of the steep sandy slope. 

 The Lower Oolite forms the surface of Osmotherley Moors, and 

 sinks beneath the calcareous range, to reappear on the south of 

 it. At Whitestone Cliff the summit of this series is 850 feet above 

 the sea-level, and its thickness 600 feet. In the Coxwold 

 hollow it occupies the low ground and the summit of the ridge 

 on the south, and a spur stretches out westward in the direction 

 of Carlton Husthwaite and Thirkleby. The calcareous band is 

 worked for lime in several places. The Upper Lias Shale was 

 formerly worked for Alum and Jet at Thimbleby, and has 

 recently been worked for Jet in Cotcliffe wood. 



For Montane plants this is the second of the four hilly districts 

 of the east. It has only a mere edge of limestone hill, and in 

 Xerophilous species is not rich, nor are those which do occur 

 plentiful. The low grounds from Thirsk and Northallerton 

 westward to the Wiske and Swale produce a considerable number 

 of Hygrophilous species, especially the vicinity of the first-men- 

 tioned stream; and for Rarer Ascending species this district is only 

 below the more extensive districts of West Swale and Derwent. 



GEOGRAI'HICAL ANALYSIS OF 



THE FLORA OF THE EAST SWALIC DISTRICT. 



AREA 170 SQUARE MILES. 



CATEGORY. 



Number of species. 



Per centage of 

 total native flora. 



I Montane Species .. 



23 



23 







54 

 362 



"159 

 15 

 70 



24 



4 

 4 

 

 8 



57 



25 



2 







5 General Ascending Species 



6 Scattered Ascending ,, 



7 Local Ascending ,, 



9 Denizens .. 



Total number of llic species 



730 





Jan. 1889. 



