46 A NEW FLOEA OP 



Erica cinerea. 

 Vaccinium mjTtillus. 

 Pyrola media. 

 Ilex aquifolium. 

 Thymus serpyllum. 

 Teucrimn scorodonia. 

 Quercus robur. 

 Juniperus communis. 



Convallaria polygonatum. 

 Triodia decumbens. 

 Brachypodium sylvaticum, 

 Agrostis vulgaris. 

 Festuca ovina. 

 Aira caryophyllea. 



prascox. 

 Pteris aquilina. 



Of the slate rocks we have no large or characteristic develop- 

 ment vs^ithin our bounds, but we have, near at hand, in the Lake 

 district, a very considerable range of hills, where beds of this 

 class cover wide surfaces. Unlike the porphyry and basalt, the 

 slate rocks exclude absolutely the special limestone plants ; but 

 like the porphyry and basalt, they are much less heathery than 

 the sandstone, with but little peat upon their surfaces, and with 

 clear transparent streams, and some of the pascual plants do not 

 ascend so high amongst them as with the limestones. But on 

 the other hand, as they rise to a greater height than the hills 

 formed of any of the other three kinds of rock, and present a 

 greater variety of surface in the Upper zone, many plants ascend 

 higher amongst them than anywhere on the east side of the island, 

 and they furnish several boreal plants which we do not get in 

 the east at all. Por comparison with the two upper zone florulas 

 already enumerated, we give one for a characteristic crag of the 

 slate formation, and have selected for that purpose a list of spe- 

 cies noted on the face of the well-known Striding Edge cliff, 

 which rises from the banks of the Red Tarn, on the west side of 

 Helvellyn, at an elevation above sea level of from 800 to 950 

 yards. 



Florula of an Upper Zone Slate Crag. 



Thalictrum alpinum. 

 Anemone nemorosa. 

 Cardamine pratensis. 

 Viola sylvatica. 

 palustris. 

 Alchemilla vulgaris, 

 alpina. 



Pyrus aucuparia. 

 Cerastium tl•i^4ale. 



alpinum. 

 Saxifraga nivalis. 



hypnoides. 



stellaris. 



aizoides. 



