332 24. ROSACEA. 



marks it as an introduced species in the Isle of Wight. 

 As it is absent from the more numercyas other lists, which 

 record the plants of the two first provinces, I have hesitated 

 to receive it for a genuine native. By Dr. Graham it was 

 observed so far north as Sutherland, and it is marked in 

 the Catalogue checked for Ross, by the Rev. G. Gordon. • 

 Well-grown trees occur by the river at Castletown of Brae- 

 mar, which will exceed 300, if not 350 yards of elevation. 



316. Prunus Cerasus, Linn. ^ ^d /f^ /^. . ^/r. 

 Cerasus austera, height. 



Ai-ea 123*5/789** 12. 



South limit in Cornwall, Isle of Wight, Sussex. 



North limit in Cumberland and .^ 



Estimate of provinces — ? Estimate of counties — ? 



Latitude 50^ — 55. English (.?) type of distribution. 



Agi'arian region. Inferagrarian — Midagiarian zones. 



Descends nearly or quite to the coast level, in the Channel. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 51 — 47. 



Native. Septal. As the fruticose Cheny is usually dis- 

 tinguished with facility from the arborescent one ; and as 

 many good British botanists hold the two to be specifically 

 distinct, it has appeared better to show their distribution 

 apart, so far as present information will go. The localities 

 in the counties of Cornwall, Devon, Dorset, Hants (Isle of 

 Wight), Sussex, Sun-ey, Salop, Denbigh, Leicester, Ches- 

 ter and Cumberland, are all those at present known to me, 

 either as an eye-witness, or as relying upon the eyes of 

 others ; but there appear good reasons for supposing that it 

 will be ascertained in many other counties, by those bota- 

 nists who may look for it, apart from Prunus avium. 



