280 87. FILICES. 



porch of Adderbury Church, Oxfordshire. Until further 

 confirmed, or verified afresh, these three stations are 

 discarded. Two other counties, Kent and Denbigh, still 

 remain luicertain to me, as I am not prepared to say 

 whether the locality of Tunbridge Wells embraces part 

 of Kent as well as Sussex, nor whether Mr. Wilson's 

 station for this fern, near Llanroost, belongs to Caernar- 

 von or Denbigh ; Mr. Newman, likely to be correct, places 

 the station under the former county. Mr. Bennett reports 

 this species at about 700 feet in Merionethshire. The 

 station near Llanroost may be as high, or may be of lower 

 elevation; but until more exactly informed about it, I 

 cannot venture to indicate a higher or lower mean tempe- 

 rature than 46. 



1399. AsPLENiUM Adiantum-nigrum, Linn. 



Area general. 



South limit in Cornwall, Isle of Wight, Kent. 

 CU/^t'.v^ North limit in Orkney, Hebrides, Sutherland. 



Estimate of provinces 18. Estimate of counties 80. 



Latitude 50 — 60. British type of distribution. 



A. A. regions. Inferagrarian — Inferarctic zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 650 yards, in East Highlands. 



Range of mean annual temperature 53 — 41. 



Native. Eupestral. The genus Asj)lenium is whoUy 

 omitted from the Flora of Shetland ; and as the present 

 species may perhaps be absent from the small county of 

 Huntingdon, I do not estimate the comital census quite 

 to the highest degree. Judging by my notes and recol- 

 lections it is extremely scarce above the agrarian region. 



