15. TILIACE^. 243 



be disappearing, and last year I could find only three or 

 four plants. When I first noticed it there were hundreds 

 scattered along the whole length of the raised portion of 

 the road." (Henry Donbleday, in the Phytologist, vol. i. 

 page 265. — 1842.) 



1^/^. //// . S^S , 211. TiUA PARViFOLiA, i;/ir/i. 



Area 123456 (7) 8** (11) 12. 



South limit in Devon and Sussex. 



North limit in Cumberland and ? 



Estimate of provinces 8. Estimate of counties 15. 



Latitude 50 — 55. English type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends nearly to the coast level, in the Peninsula. 



Ascends to 100 yards, in the Lake province. 



Range of mean annual temperature 51 — 47. 



Denizen. Sylvestral. With this, as with some other 

 apparently indigenous trees, doubts will arise whether they 

 should be regarded as true natives, or as species origiually 

 introduced from the European continent. On the whole, 

 the presumption seems in favour of this species being a 

 genuine Briton. If so, we must explain its present scarcity, 

 on the supposition that human operations have tended more 

 towards extinguishing, than towards encouraging and dif- 

 ftising the species in England: a supposition which is 

 countenanced by the fact of some of its recorded localities 

 producing only single or few aged trees, and these existing 

 in spots where they were not likely to have been planted 

 for any purpose of use or ornament. We have now so very 

 few really natural woods left in England, that the existence 

 of " entire woods of this species at Buckland, near Ash - 

 burton," seems an insufficient reason, by itself, for holding 



