368 24. BOSACE^. 



North limit in Sutherland and Argyleshire. 



Estimate of provinces 13. Estimate of counties 40. 



Latitude 50 — 59. British type of distribution. 



Agrarian region, Inferagrarian — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 300 yards, or upwards, in North Wales. 



Range of mean annual temperature 51 — 45. 



Native. Sylvestral and Rupestral, Decidedly more 

 frequent in England than in Scotland ; but since it is re- 

 ported to be wild so far northward as the county of Suther- 

 land, it may be deemed nearer to the British than to the 

 English type, although one of the more sparingly distri- 

 buted examples of the former. The P. pinnatifida appears 

 to be only a trifling, though somewhat remarkable variety; 

 and it is a planted tree in several of the localities recorded 

 for it. The P. intermedia has more the aspect of a distinct 

 species ; and might be so held, were it not connected to 

 P. Aria by other varieties, again intermediate between 

 itself and the latter. 



366. Pyrus Aucuparia, Gaert. 



Area, general. 



South limit in Cornwall, Isle of Wight, Kent. 

 North limit in Shetland, Orkney, Hebrides. 

 Estimate of provinces 18. Estimate of counties 75. 

 Latitude 50 — 61. British type of distribution. 

 A. A. regions. Inferagrarian — Midarctic zones. 

 Descends to the coast level, in the Peninsula. 

 Ascends nearly to 900 yards, in the East Highlands. 

 Range of mean annual temperature 50 — 38. 

 Native. Rupestral and Sylvestral. Rather scarce in 

 the south-east of England; and seen but seldom above 



