46. ERICACE^. 155 



Estimate of provinces 8. Estimate of counties 20. 



Latitude 54 (53)— 61. Highland type of distribution. 



A. A. regions. Superagrarian — Midarctic zones. 



Descends to the coast level, in the West Highlands. 



Ascends to 900 or 950 yards, in East Highlands. 



Range of mean annual temperature 47 — 37. 



Native. Ericetal. One of the connecting lints between 

 the Highland and Scottish types of distribution. It has 

 been said to grow in the counties of Salop (Aiken) , Stafford 

 (Anon., in Garner N. H. S.), Derby (Howard, in B. G.), 

 Chester (Bradbury, in B. G.), Lancaster (Ray) ; but none 

 of these can be taken as clearly established habitats, and 

 not unlikely Vaccinium Vitis-Idsea may occasionally have 

 been mistaken for this shrub. 



702. Arbutus Unedo, Linn. 



Hibernian. Opinions differ as to whether this beautiful 

 shrub is truly and aboriginally native of Ireland. Formerly, 

 it was considered to be of monastic introduction ; latterly, 

 opinion seems leaning towards the admission of its genuine 

 nativity. 



Ledum palustre, Linn. 



Incognit. Unfoi-tunately figured in English Botany as a 

 native of Ireland, on testimony which did not merit the 

 credence given to it. There is no sufficient ground for 

 supposing that any wild example of this shrub was ever 

 found in Ireland. 



