2-1. ROSACEiE. 333 



/^^■///. [J. z;^/^^ 316,b. Prunus avium, Linn. 



Area 1 2 3 4 5 ^ 7 8 9 10 11 12 13 14 15 16. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Aberdeenshire, Perthshire, Arg>'leshire. 



Estimate of provinces 16. Estimate of counties 60, 



Latitude 50 — 58. British (?) type of distribution. 



Agi-arian region. Inferagi-aidan — Superagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 150 yards, in the East Highlands. 



Range of mean annual temperature 51 — 46. 



Denizen. Sylvestral and Septal. As belonging to this 

 species, I take all the habitats published for " P. Cerasus," 

 excepting those which are accompanied by some intimation 

 that the authors intended to apply that name to the Cerasus 

 austera of Leighton. For ample details on their differences, 

 I would refer to the Flora of Shropshire, pp. 523 to 527. 

 The Rev. G. Gordon considers this to be certainly intro- 

 duced hito Moray. Dr. Dickie records it about the river 

 Don, in Aberdeenshire, on the authority of Mr. A. Fleming. 

 Fine trees of it occur at Killin, in Perthshire ; whether 

 planted I cannot say. Professor Balfour marks the name 

 (but which species is intended }) in a list of plants checked 

 for Islay, at the southern extremity of the West Highland 

 province. In England, P. avium is of frequent occun-ence ; 

 but I entertain considerable suspicion that in many in- 

 stances (if not, aboriginally in all) these wild trees owe 

 their existence to seeds disseminated by birds which resort 

 to the Cheny-trees in gardens. Jays, thmshes and black- 

 birds swallow the fiiaiit whole, and disgorge the " stones " 

 after a short period ; during which they may often resort 

 again to the fields and groves, and may thus sow the seeds. 



