120 WHERE TO FIND FERNS. 



these fall off, the sori, become confluent and densely 

 cover the whole under side of the frond. 



HABITATS. Walls of all kinds, more or less old, brick 

 and stone ; ruins, bridge-arches, garden and house walls, 

 and, indeed, every description of masonry the luxuri- 

 ance of the plants depending upon the greater or less 

 accumulation of leaf-mould in the moist holes or seams 

 of soil in rock or wall, and upon the greater or less 

 amount of shade or moisture of the position. Stony 

 banks, or soil covered by large or small pieces of stone, 

 such as hedgebanks, streambanks, or the banks formed 

 by cuttings through hilly, rocky, or moorland country, 

 are also the favoured habitats of this beautiful species. 

 Where, on such banks, shrubs, growing from between 

 the stones, give shelter, and, at the same time, provide 

 by the annual deposit of leaves for the enrichment 

 of the soil, Asplenium adiantum-nigrum grows in its 

 finest form. 



WHERE FOUND. In England, in the counties of 

 Bedford, Berks, Bucks, Cambridge, Chester, Cornwall, 

 Cumberland, Derby, Devon, Dorset, Durham, Essex, 

 Gloucester, Hants (the mainland and the Isle of Wight), 

 Hereford, Hertford, Kent, Lancaster, Leicester, Lincoln. 

 Middlesex, Monmouth, Norfolk, Northampton, Northum- 

 berland, Nottingham, Oxford, Rutland, Salop, Somerset, 

 Stafford, Suffolk, Surrey, Sussex, W T arwick, Westmore- 

 land, Wilts, Worcester, and York. In Wales, in the 

 counties of Anglesea, Caermarthen, Caernarvon, Car- 

 digan, Denbigh, Flint, Glamorgan, Merioneth, Mont- 

 gomery, Pembroke, and Radnor. In the Isle of Man. 

 In Scotland, in the counties of Aberdeen, Argyle, Ayr, 

 Banff, Berwick, Caithness, Clackmannan, Cromarty, 

 Dumbarton, Dumfries, Edinburgh, Elgin, Fife, Forfar, 

 Haddington, Inverness, Kincardine, Kinross, Kirkcud- 

 bright, Lanark, Linlithgow, Nairn, Orkney, Perth, Ren- 

 frew, Ross, Roxburgh, Selkirk, and Sutherland ; also 

 in the islands of Ailsa Craig, Arran, Cantyre, Harris, 



