87. FILICES. 261 



Descends to 400 yards, in East Highlands. 



Ascends to 1100 yards, in same province. 



Eange of mean annual temperatiu'e 43 — 36. 



Native. Rupestral. Descends so low as 1550 feet in 

 tlie west of Yorkshire, according to Mr. Newman ; or 1500 

 feet, according to Mr. Tatham ; which is rather lower 

 (relatively to latitude) than 400 yards in the Highlands. 

 I have only one note of seeing this species in the super- 

 arctic zone and ahove 1000 yards of altitude ; namely, on 

 a rock close under one of the high summits hetween Ben 

 Lawers and Craigalleach, the precise altitude of which I 

 do not know, but estimate it at nearly 1100 yards; the 

 Calluna ceasing considerably lower, and thus leading that 

 summit to be accoimted within the superarctic zone. The 

 counties of Cambridge, Northampton, Glamorgan, Cum- 

 berland, and Lanark, recorded for the present species 

 through misapplications of the specific name, or only on 

 unsafe and unconfirmed authority, are excluded in the 

 area above given. Mr. Duguid is said to have found a 

 single plant of this species on Hoy Hill, Orkney ; but as 

 other botanists have not re-found it there, within my 

 knowledge, the province of the North Isles is also ex- 

 cluded for the present. 



1383. ASPIDIUM ACULEATUM, <S^W. 



Ai-ea 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16. 



South limit m Cornwall, Isle of Wight, Kent. 



N. limit in Fife (Arnott), Bute (Murraj') : Hook. Scot. 



Estimate of provinces 16. Estimate of counties 60. 



Latitude 50 — 57. English type of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



