46. ERICACEiE, 149 



Latitude 50 — 61. British type of distribution. 



A. A. regions. Inferagi'arian — Inferarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 750 yai-ds, in East Highlands. 



Range of mean annual temperature 52 — 39. 



Nativ^e. Ericetal, Glareal. Apparently absent from the 

 counties of Bedford and Huntingdon, from both of which 

 the E. Tetralix is reported. In general, I think, E. cinerea 

 is the more abundant of the two species, except on the wet 

 heaths of the mountainous districts. The upper limits of 

 both species are very uniform in respect of altitude, unless 

 so far as varied by the nature of the ground. Passing from 

 Scotland, E. cinerea prevails in a north-westerly direction, 

 while E. Tetralix prevails in a more easterly direction. 

 The former is said to be the more fi-equent species in Shet- 

 land, and it occurs in Faroe without E. Tetralix. Both 

 grow in South Norway ; E. Tetralix only, in Denmark and 

 South Sweden. 



693. Erica mediterranea, Linn. 



Area [6]. 



Hibernian. Incognit in Biitain. In the Botanist's 

 Guide of Turner and Dillwyn, the latter of the two authors 

 remarks, " Dr. Turton once told me he had a wild specimen 

 of E. mediterranea brought him, which was gathered some- 

 where in the neighbourhood " of Swansea, Glamorganshire. 

 This was doubtless an eiTor ; but there is some probability 

 that the specimen brought to Dr. Turton may have been 

 one of Erica vagans. The present species is native in Ire- 

 land. \Vhether the Hibernian species is truly the Linnean 

 E. ntediterranea, I am unprepared to say. Strangely 

 enough, Mr. Bentham unites the Irish species with E. 



