46. ERICACE.E. 153 



Range of mean annual temperature 42 — 35. 



Native. Ericetal, Glareal. Reported to occur in the 

 counties of Stirling, Perth, Forfar, Aberdeen, Banff, Moray, 

 Argyle, West-Inverness, Ross, Sutherland, Orkney, and 

 Shetland. To these twelve, perhaps, some of the four fol- 

 lowing will eventually be added ; namely, Dumbarton, Kin- 

 cardine, Caithness, or Hebrides ; indeed that of Dumbarton 

 has been recorded (N. B. G.) The lower limit of this little 

 shrub, serving well to mark the commencement of the Mid- 

 agrarian zone in many places, may be taken at 700 to 750 

 yards along the eastern and central Grampians ; at 650 to 

 700 yards about Ben Nevis ; at 500 yards in Sutherland ; 

 and lower considerably in Shetland, probably about 400 

 yards. 



699. Andromeda polifolia, Linn. 



Area 1 * 3 4 5 6 7 8 9 10 11 12 13 * 15. 



South limit in Somerset, Bucks ? Hunts, Norfolk. 



North limit in Perth, Renfrew, Northumberland. 



Estimate of provinces 13. Estimate of counties 25. 



Latitude 51 — 57. Scottish type of distribution. 



Agrarian region. Inferagrarian — Superagrarian zones. 



Descends to the coast level, in Somerset. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 49 — 46. 



Native. Ericetal, Uliginal. The distribution of this 

 little shrub is peculiar in Britain, whether compared with 

 that of other species which are assigned to the Scottish 

 tj-pe, or with its distribution on the continent of Europe. 

 It differs from the usual character of the Scottish or boreal 

 type, by its early northern limit, and by its apparent ab- 

 sence from the eastern provinces of Scotland, excepting 



