46. ERICACEAE. 151 



Estimate of provinces 18. Estimate of counties 82. 



Latitude 50 — 61. British type of distribution. 



A. A. regions. Inferagrarian — Midarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 1100 yards, in East Highlands. 



Range of mean annual temperature 52 — 36. 



Native. Ericetal. I have authority for the existence of 

 this well-known shrub in every county of Britain, with the 

 exception of Berks, Bucks, Northampton, Radnor, Mont- 

 gomery, Flint, Lincoln, Ayr, Haddington, and Linlithgow ; 

 and in half of these ten counties I have probably seen it 

 myself The upper line runs from 900 to 1100 yards, in 

 the West of Aberdeenshire ; on and near Ben Lawers, in 

 Perthshire, so low as 750 to 900 yards ; about Drumochter 

 Forest, in the counties of Perth and Inverness, from 900 to 

 950 yards ; on and about Ben Nevis, from 750 to nearly 

 900 yards ; about 800 yards in the North-west of Suther- 

 land. Mr. A. Petermann gives me the altitudes of 2334 

 and 2328 feet, on Stob Choressan and Sgur Ghaoire, two 

 mountains near Ben Nevis. 



^ /^ //V /,. ■ 4^^. 696. Menziesia cerulea, Sm. 



Area ^ ^ :i^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^\b [16]. 



South and North limits in Perthshire. 



Estimate of provinces 1. Estimate of counties 1. 



Latitude 56 — 57. Highland type of distribution. 



Aj-ctic region. Midarctic zone. 



Descends ? Ascends ? (About 900 yards.) 



Range of mean annual temperature, say 38. 



Native. Ericetal. An extremely rare shrub in Britain, 

 if not quite extinct now in the only certain locality which 

 has been clearly ascertained for it ; namely, on a hill, called 



