238 55. LAMIACE^. 



appears rather in favour of this being truly a native spe- 

 cies ; although, if so, it can still be deemed really indige- 

 nous in very few of the provinces. Babington admits it as 

 a native. Henslow marks it under suspicion. Hooker 

 considers it introduced. In the Edinburgh Catalogue, it is 

 recognized as indigenous, though rare, in the Forth circuit. 

 I have seen it well established by a ruined house in Aber- 

 deenshire, fully 400 yards above the sea level ; where it 

 would be in a mean yearly temperature of 42 degrees, or 

 less. 



805. Mentha piperita, Linn. 



Area 1 2 3 4 5 6 7 8 9 10 11 * * 14 15 16. 



South limit in Cornwall, Devon, Isle of Wight ? Sussex. 



North limit in Aberdeen ? Forfar ? Perth } Dumbarton. 



Estimate of provinces 14. Estimate of counties 30. 



Latitude 50 — 57. English type of distribution. 



Agrarian region. Inferagrarian — Midagi'arian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 100 or 200 yards, in England. 



Range of mean annual temperature 52 — 47. 



Native. Paludal, Inundatal. This species appears to 

 be certainly indigenous in some of the southern provinces 

 of England, and may even be so in Scotland likewise. But 

 its recorded localities are subject to the same distrust, in 

 consequence of many of them being artificial, and uncer- 

 tainty, through errors of nomenclature, as those of the thi-ee 

 preceding species were stated to be. I feel quite unpre- 

 pared to indicate accurately the true northern limit, census, 

 range of latitude, &c. of any of these four species. 



