lOO baker's north YORKSHIRE. 



succeeds well, but neither of them thrive at Thirsk, which is 

 from 450 to 560 feet lower. We cannot emulate at Thirsk the 

 luxuriant Roses of Coxwold and Rievaulx, climbing the wall 

 sides of the cottages and wreathing round the windows of the 

 upper storeys, and in Autumn the Dahlias and other tender 

 herbaceous plants are often cut down by frosts at Thirsk before 

 they are reached upon the hill-side. Of the wild plants killed 

 or seriously injured by the frosts of i860 the Broom ascends 

 to 300, the Oak and Furze to 400 and the Ivy and Holly to 

 450 yards amongst the hills. 



A note by my friend James Backhouse, respecting the 

 effect of the same frost upon a Deodar at York is also worth 

 quoting for the sake of its climatic bearing. The first two feet 

 of the tree above the snow were quite killed ; at four feet it was 

 comparatively little injured ; and at seven feet it was as fresh as 

 it was where the snow completely protected it. 



Ascending and Descending Wild Plants. — By far the greater 

 number of the wild plants which we possess are most plentiful 

 in the low country and become less frequent and finally run out 

 as we ascend. The flowering plants and ferns to which this 

 does not apply, the Descending or Montane species, such as are 

 most plentiful amongst the hills and either altogether absent 

 from or less frequent in the vales, are 86 in number. In the 

 following list these are arranged under three classes and are 

 further arranged under each class according to their lines of 

 limitation in a doivnward direction, so far as these are known 

 to me. 



Class A. — Species confined exclusively to the western 

 moorlands and slopes. Total 46. 



850 Yards. Carex rigida. 

 750 ,, Myosotis alpestris. 

 600 ,, Dry as octopetala. 

 550 ,, Poly gala aiistriaca. 

 500 „ Pyrola secunda. 



