414 35. SAXIFRAGACEiE. 



Descends to 1250 yards (and lower ?), in East Highlands. 



Ascends to 1300 yards, in the same province. 



Range of mean annual temperature 35 — 34. 



Native. Rupestral. Extremely local ; being found 

 only near the summit of Ben Lawers, and - (aooording t e 

 JJooker - and Borrer) - on . Crai g alleach . Unless there is 

 some mistake respecting the latter station, the lower limit 

 may descend to 900 or 1000 yards ; for Craigalleach does 

 not much exceed 1000 yards in height. Though that hill 

 has been much visited, I am unaware of any succeeding 

 botanist having re-found and confirmed the locality for 

 this species ; and a mistake might readily be made 

 through mingling specimens of plants collected on adja- 

 cent hills. 



429.*Saxifraga rivularis, Linn. ^ t^- ^^^ ■ A .^^^ 



Area ***-******■***** 15 16. 



South limit in Perthshire and Forfarshire ? 



North limit in Moray and West Inverness. 



Estimate of provinces 2. Estimate of counties 3. 



Latitude 56 — 58. Highland type of distribution. 



Arctic region. Superarctic zone. 



Descends to 1100 or 1000 yards, in W. Highlands. 



Ascends to 1200 yards, in the same province. 



Range of mean annual temperature about 35. 



Native. Rupestral. I have seen this species in two* of 

 its few localities ; namely, on Ben Nevis, where it grovps 

 at 1000 or 1100 yards above the sea, in a spot irrigated, 

 while the plant is in flower, by water trickling from the 

 melting snow shortly above ; also, on the northern decli- 

 vity of the adjacent Red Cairn Hill, in a spot upon which 



