142 4. CRUCIFER^. 



90. ARABIS STRICTA, Hiids. 



Area 1^*^5^[7****12]. 



South limit in north of Somerset. 



North Umit in south of Gloucestershire. 



Estimate of provinces 2. Estimate of counties 2. 



Latitude 51 — 52. Local t;ype of distribution. 



Agrarian region. Inferagi'arian zone ? 



Ascends to ? 



Descends to ? 



Range of mean annual temperature (49 or 48) ? 



Native. Rupestral. Peculiar to some few spots in the 

 neighbom-hood of Bristol and Cheddar. As the line which 

 divides the provinces of the Peninsula and Severn, or the 

 counties of Somerset and Gloucester, happens to cross the 

 small area within which this very local plant is circum- 

 scribed, it is accordingly indicated from two provinces, al- 

 though distributed within a space altogether not equal to a 

 county of average size. In North Wales, Arabis hii'suta 

 was mistaken for this species ; and the same mistake may 

 likely have happened in the Lake province, where we have 

 no good authority for the occun-ence of A. stricta. 



91. Arabis ciliata, Br. 



Hibernian. Native in Ireland. Incognit in Scotland. 

 The late George Don found an Arabis, which he calls 

 " Turritis nov. sp.^'' near Lochlee, in Glen Esk, growmg 

 on rocks ; and he states that Mr. J. T. Mackay recognized it 

 as the same which he had found in Ireland, and which Dr. 

 Smith had considered as T. alpina, of Linnteus. In the 

 ' Flora Scotica, ' the Glen Esk plant is referred to A. ciliata ; 



