286 87. FiLiCES. 



as sliglitly ascending into the inferarctic zone. Its upper 

 limit on the southern and eastern declivities of the Gram- 

 pians, may average about 500 yards; but on the perfectly 

 open and exposed moors, exclusively of woods and shel- 

 tered ravines, the average line would very likely be as low 

 as 400 to 450 yards. 



1405. Adiantum Caph-lus-Veneeis, Linn. 



Area 1 * * * [5] 6 * [8] * [10] * 13 * * [15 16]. 



South limit in Cornwall, Devon, Somerset ? 



North limit in Isle of Man, Glamorgan. 



Estimate of provinces 3. Estimate of counties 5. 



Latitude 50 — 55. Atlantic t}^e of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends scarcely above the coast level. 



Range of mean annual temperature 52 — 49. 



Native. Rupestral. Specimens are in my herbarium 

 from Cornwall (Rev. J. S. Tozer), Devon and Glamorgan 

 (Bot. Soc. London). There can be no question about the 

 growth of this species in the Isle of Man. (See letters 

 from Mr. F. F. Clark, and Mr. T. G. Rylands, in Phytol. i. 

 90 and 150). Some other habitats on record are insuffi- 

 ciently certified or positively erroneous. " Said to grow at 

 the mouth of an old weU at Clevedon", Somerset (Mr. L. 

 H. Grindon, in Phytol. i. 964). In Dovedale, Stafford or 

 Derby, according to " Mess. Butt and Forster, Corresp. 

 of Sir. J. Smith : not there now " (Garner, Nat. Hist, 

 Staff.). Also in the Peak of Derbyshire, in 1844, accord- 

 ing to Mr. H. E. Smith, but afterwards shown to be an 

 error (Phytol. iii. 11 and 449). Banks of the Carron, a 

 rivulet in Kincardineshire, (Prof. Beattie, in Eng. Flora) ; 



