24. ROSACEiE. 367 



originated immediately or remotely from those of the or- 

 chard. The Rev. G. Gordon considers it certainly intro- 

 duced into Moray; and it is omitted from the Flora 

 Abredonensis. Mr. Gardiner still collects it in Don's 

 habitat near Glammis. I observed a bush of it by the 

 Dochart, near Killin ; but could not suppose it native 

 there. Said to be rare about Edinburgh, frequent about 

 Glasgow, common about Berwick on Tweed. Type of 

 distribution almost British. 



/^/^■///I /^■^^f^. 364. Pyrus torminalis, Sm. 



Area 12 3 4567 8|* (11)./''?./' 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Nottinghamshire and Anglesea. 



Estimate of provinces 8. Estimate of counties 30. 



Latitude 50—54. English type of distribution. 



Agrarian region. Inferagrarian zone. 



Descends nearly to the coast level, in the Peninsula. 



Ascends to 1 00 or 200 yards, in England. 



Range of mean annual temperature 50 — 48. 



Native. Sylvestral. Though still to be found in most 

 of the English counties southward from York or Derby, 

 this species is probably in course of extirpation by im- 

 proved farming and other rural changes. 



365. Pyrus Aria, Sm. /c^ l^^-^^Y. ^ ■ ^^S^ 

 365,b. Pyrus pinnatifida, Elirh. -^ //<«'- />^/. /• •></- 

 365,c. Pyrus intermedia, Elirh. ♦ - /- ^'f^- 



Area 1 2 3 4 5 6 7 8 * 10 11 12 (13 14 15) 16 17. 

 South Hrait in Devon, Isle of Wight, Kent. 



