55. LAMIACEiE. -239 



806. Mentha aquatica, Linn. 

 &c. &c. 



Area general. 



South limit in Cornwall, Isle of Wight, Kent. 

 North limit in Orkney, Ross, Aberdeen, Argyle. 

 Estimate of provinces 18. Estimate of counties 80. 

 Latitude 50 — 60. British type of distribution. 



(Agrarian region. Inferagrarian — Superagrarian zones. 

 Descends to the coast level, in the Peninsula. 

 Ascends to 300 yards, in Cumberland. 

 Range of mean annual temperature 52 — 45. 

 Native. Paludal. This is probably a scarce plant in the 

 [ three most northerly provinces. Said to grow near Killin, 



which is about 150 yards of elevation, in the East High- 

 lands. I did not myself observe it in the Highland valleys. 

 Mentha citrata or odorata, said to be a variety of the pre- 

 sent species, has been reported from about a dozen of the 

 Enghsh counties, though in some of these probably as an 

 escape from gardens only. 



^ /Wi//// ^j,^ 807. Mentha sativa, Litm. 



&c. &c. 



Area 1 2 3 4 5 6 7 8 9 10 11 * 13 14 15 16. 



South limit in Cornwall, Isle of Wight, Kent. 

 North limit in Moray .'' Argyle, Fife. 

 Estimate of provinces 16. Estimate of counties 50. 

 Latitude 50 — 57 (58). English type of distribution. 

 Agrarian region. Superagrarian — Midagrarian zones. 

 Descends to the coast level, in the Peninsula. 



