Humber.—Yorkshire: Settle; also rather broader and somewhat
irregular, rf. Clapham; "VYonsleydale ; Gordale, Craven.
Lakes.—Cumberland: A. Clowes. "VYestmorland: Whitbarrow, A. C.
N. Wales.—Carnarvonshire: Llanberris, Lhmjd; also a very
slender form, J. Atkins.
A. Lowlands.—Edinburghshire : Pentland HiUs.
A. Highlands.—Perthshire : Ben Lawers, T. M.
Connaught.—Sligo : Lough Gill, B. Barrington.
2. oUusa (M.). This is a distinct and constant form under cultivation.
The fronds are dark green, nearly or quite a foot in
height, and of a lanceolate form ; they are peculiar from their short
hlunt ovate or roundish-ovato narrowly and shortly stalked pinnules,
which are deeply pinnatifid into hlunt oblong lobes, notched with
small narrow but bluntish teeth, which are sometimes very evident;
the spores are echinate. It was found in Scotland by Mr. A. Tait.
Wo refer here specimens from—Yorkshire : Newton Yale near
Whitby, A. Clapham. Westmoreland : Kentmere, A. Clowes; Whitbarrow,
Q. B. W. Cumberland: Borrowdale, O. B. Wollaston.
Carnarvonshire: Llyn Ogwen, /S'. 0. Gray.
3. dentata (Hook.). The fronds of this elegant form are usually
of small size, four to eight inches long, narrowish, bipinnate, or with
more or less confluent pinnules, so that tho narrow fronds are
sometimes scarcely bipinnate ; these pinnules are hlunt oblong, blunttoothed,
or obscurely blunt-lobed, and the sori are placed near their
margin, the centre of the pinnule being clear. Somewhat larger
and more deeply lobed forms, having the same aspect, are met with,
and through these it gradually merges into oUusa, and thence into
the normal state. There are some of the cultivated forms of this
variety that are certainly constant, though it is probable from its
being often looked on as inconstant, that accidentally blunt-
pinnuled plants of the common form are sometimes associated with
it. The spores are echinate, hut scarcely in so marked a degree as
they are in the more typical forms of the species. [Plate CII A.]
This variety has been met with in the following habitats:—
Peninsula.—Somersetshire : Cheddar.
Channel.—Wiltshire : Box Quarries, Ar. Alexander.
Thames.—Surrey : Albury, T. M.
Severn.—Warwickshire: Arhury. Monmouthshire: Pen-y-gam
near Pont-y-pool, and on Mynydd-maen, T. H. Thomas; Skirrid
Yawr near Abergavenny. Herefordshire : The Dowards on the
Wye. Staffordshire : Ecton Tor, Rev. A. Bloxam.
Trent.—Derbyshire : Dovedale, 8. Buckland ; Matlock Baths.
Mersey.—Cheshire. Lancashire.
Humber.—Yorkshire : Settle ; Wensleydale, C. TI. Compton.
Tyne.—Durham: Cauldron Snout. Northumberland: Linhope,
Cheviot Eange, Bev. B. Taylor ; Mitford Church, near Morpeth.
Lakes.—Cumberland: Borrowdale, Miss Wright; Egremont, J.
Robson; IJllswater, G. B. Wollaston. Westmoreland: Kendal;
Windermere, A. Cloives; Arnside Knot, H. A. Geldart ; Fairfield
near Ambleside. N. Lancashire : Silverdale.
S. Wales.—Glamorganshire : Pont-nedd-Yechn ; Abergavenny, A.
Lees; Glyn Neath, A. Lees. Brecknockshire : Brecon, A. Williams.
N. Wales.—Anglesea, Rev. H. Davies. Denbighshire : Llangollen
; near Wrexham ; Euthin, T. Rriichard. Flintshire : Castle
Dinas Bran, H. Shepherd. Montgomeryshire: Craig Breiddon,
Rev. W. A. Leighton. Carnarvonshire : Llanberris ; precipices of
the highest peak of Snowdon, B. Barrington ; Penmaen Mawr, &o.
W. Lowlands.—Dumfries-shire : Moffat Dale, P. Gray. Kirkcudbrightshire
: Cluden Hills (formerly), P. Gray.
A. Lowlands.—^Linlithgowshire ; WoodcockDale Wood, Dr. Balfour.
A. Highlands.—Stirlingshire : banks of Loch Lomond. Forfarshire
: Glen Isla, H. M. Balfour. Perthshire : Ben Lawers, T. M.
Inverness-shire : Kingussie. Aberdeenshire : Braemar, A. Croall.
W. Highlands.—W. Inverness-shire : Ben Nevis.
N. Highlands.—Caithness : Morven, T. Anderson.
N. Lsles.—Orkney : Hoy, T. Anderson.
JJlster.—Antrim : rooks at Carriokfergus, Mr. Templeton. Donegal,
R. Barrington.
4. decurrens (M.). This form is intermediate in aspect and
character between dentata and Dickieana, approaching the latter in
having the pinnæ deflexed, and the pinnules deourrent, but differing
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