88 THE BRITISH FERNS. 
parts of wet woods; sometimes growing in limestone districts along 
with P. Robertianum. Its north limitis attained in Sutherlandshire : j 
hence it extends southwards, through the Lowlands of Scotland and 
the north of England, to South Wales and the centre of England, 
occurring in Devonshire near the extreme south-west, but avolding 
the eastern side of the island. It is very rare in Ireland. As 
regards elevation it extends from near the sea level in Devonshire, 
to a height of about 2700 feet in the West Highlands. Its habitats 
are as follows :一 
Peninsula.—Devonshire: near Ilfracombe, Rev. J. M. Chanter 5 
Challacombe, Exmoor, H. F. Dempster. 'Somersetshire : Mendip 
Hills; near Bristol; near Bath. 
Channel.—? Hampshire: Petersfield, Dr. Bromfield. Sussex: 
Tilgate Forest, Rev. T. Rooper. 
Thames.—Oxfordshire: Cornbury Quarry. ? Essex: Chingford 
Church. 
Severn.—W arwickshire: Berkswell. Gloucestershire: Lea Bailey ; 
New Weir; Frocester Hill; Atterbury Hill, above Lydbrook, Forest 
of Dean, Z. T. Bennett. Nox idle: Tintern Abbey; Pont- 
y-pool T. H. Thomas. Herefordshire: Penyard Park Wood, near 
Ross; Shobden Hill Woods; near Downton Castle, by the Teme ; 
Aymestrey Quarry. Worcestershire: Malvern Hills: ; Shrawley 
Wood. Staffordshire; Trentham Park; near Colton Hall and 
Oakamoor; near Yoxhall Lodge, Needwood Forest. Shropshire : 
Titterstone Clee Hill; Whitcliffe, near Ludlow ; Froddesley Hill. 
Trent. Eemi Chinley Hill, near Cape -en-le- — 
Pleasley Forges. Lincolnshire. 
Mersey.—Cheshire : Hill Cliff, Lancashire: Manchester : : War- 
rington; Egerton Moor, and Dean-Church Clough, near Bolton ; 
Break Clough ; Boghart Hole Clough ; Broadbank, near Colne; 
Mere Clough; Cotteril Clough ; Chaigeley Manor, E. J. Lowe; 
Lancaster; Ashworth Wood; Longridge Fell, E. J. Lowe, ete. 
Humber.—Y orkshire : Banks of the Wharfe, Burley; Brimham 
Rocks; Thirsk ; Ingleborough ; Rivaulx Woods; Teesdale ; Hali- 
fax; Whitby; Richmond; Bradford, J. 7. Newboutt ; Tyersal, 
near Bradford, G. W. Jackson; Sheffield; Hebden Balen Bolton 

