172 50. GENTIANACEiE. 



Notth limit in the same counties. 



Estimate of provinces 1. Estimate of counties 2. 



Latitude 56 — 57. Highland type of distribution. 



Arctic region. Midarctic — Superarctic zones. 



Descends to 850 or 800 yards, in East Highlands. 



Ascends to 1250 or 1300 yards, in same province. 



Range of mean annual temperature 38 — 35. 



Native. Rupestral. Only known to occur certainly 

 within the two counties above mentioned. The altitude 

 of the few stations has not been precisely ascertained. I 

 estimated the height of the only spot on which it was seen 

 by myself, in Canlochen Glen, Forfarshire, at upwards of 

 800 yards. Professor Graham says, " near the summit of 

 Ben Lawers," and Mr. W. Wilson observed it " below the 

 summit" of the same hill ; and that mountain being usually 

 considered about 4000 feet high, the upper limit of the 

 species would seem to exceed 1200 yards, at the least. In 

 the New Botanist's Guide, the county of Inverness is 

 mentioned for Gentiana nivalis, on the authority of an 

 Inaugural Essay by Dr. Boue. I have no copy of that 

 essay, from which I took notes in Edinburgh, many years 

 ago ; and am now unaware whether Boue quotes any au- 

 thority for the county in question. As a foreigner, only 

 temporarily in Scotland, much exactness could not be 

 expected in his essay on the geographical botany of the 

 country, at a time, too, when published records were few 

 and uncertain. 



721. Gentiana Amarella, Linn. /^* f^^- ^^^ J,.^i 

 721, b. Gentiana germanica, Willd. 



Area 1 2 3 4 5 6 7 8 9 10 11 12 * 14 15 16 17 18. 

 South limit in Cornwall, Isle of Wight, Kent. 



I 



