87. FILICES. 263 



Ascends to 700 yards, in East Highlands. 



Range of mean annual temperature 51 — 40. 



Native. Rupestral, Sylvestral. It wiU be seen that 

 the distribution of this species almost completely includes 

 that indicated for A. aculeatum ; having a wider range of 

 latitude and altitude, higher census, &c. The only ap- 

 parent exception, is the absence of the present species 

 from Cornwall, which is perhaps rather an absence of 

 record than a real absence of the species. Thus, if we 

 were to unite the two into one species only, their distri- 

 bution would still be indicated by the same formula, as 

 above filled up for A. lobatum only, with the one slight 

 exception. A. lobatum, in its reduced or simplified form 

 of ' lonchitidioides ' rises almost into the midarctic zone, 

 by situation though not by absolute altitude. I brought 

 a root from the height of 3100 feet, in the pass from Glen 

 Beg to Glen Clunie, East Highlands, in the year 1844. 

 Cultivated in my garden since that year, it has gradually 

 become the ordinary A. lobatum, as seen at trifling eleva- 

 tions in England. 



1384. ASPIDIUM ANGULARE, (WUld.) Sm. 



Area 1 2 3 4 5 6 7 8 9 10 * 12 ^ 14. 

 South limit in Devon, Isle of Wight, Kent. 

 North limit in Isle of Man, Westmoreland, Berwick ? 

 Estimate of provinces 12. Estimate of counties 40. 

 Latitude 50 — 56. English type of distribution. 

 Agrarian region. Inferagrarian — Midagrarian zones. 

 Descends to the coast level, in the Peninsula. 

 Ascends to 100 or 200 yards, in England. 

 Range of mean annual temperature 52 — 48. 



