the margin, with the surface near tho edge a good deal furrowed,
sent from Nettlecombe by Air. Elworthy; the other crenately-lobed,
not toothed, and having distant slightly sculptured ridges, sent from
Exeter by Mr. R. J. Gray. They aro both plants of ornamental
character.
89. jugosum (M.). The peculiarity in this variety consists in a
thickening of the veins which hear sori, resulting in the production
of a series of herbaceous ridges or sorus-like excrescences on the
upper surface, opposite to the sori of the lower surface; this
feature produces a curious ridgy appearance on the surface. Two
or three modifications of this structure have been met with. The
most marked was found in Guernsey by Air. J ames ; others have
been met with by Air. J aokson in Guernsey, and at Barnstaple in
Devonshire; Air. Wollaston has also found the same form at Ottery
St. Alary in the latter county. It is rather a capricious form, and
sometimes runs out of character in the first or summer growth.
90. papillosum (AI.). This curious variety dovelopos a series of
distinct wart-like excrescences side by side, on the upper surface of
tho veins, near their apices, forming a kind of border to the fronds ;
the latter, in the specimens we have seen, being small and rather
narrow, hut of normal outline. It was sent from Guernsey by Air.
C. Jackson, and, YC&s jugosum, is not of fixed character, producing,
however, characteristic fronds in the later or autumnal growth.
The following varieties are also more or less muricate;—submarginatum
(74), bimarginato-muricatum (83).
Crispum Series.
91. erispum (AVilld.). This beautiful variety, one of the oldest
forms known, and admired for the elegant frilling of its fronds, is, we
believe, always barren. The fronds attain the fuU size of a foot or
more in length, and two to two and a half inches in breadth, the
margin being parallel or nearly so, and exquisitely and symmetrically
waved or undulated or friUed, the extreme edge being
usuaUy more or less crenate; the base is cordate, the basal lohes
being often unusuaUy developed so as to overlie each other, and
sometimes quite separated down to the costa. Dwarf, truncate,
I
cornute, suhmarginate, or irregularly lobato fronds are produced by
this form in Air. WoUaston’s garden; they result, in his opinion,
from an injury caused at a very early stage by a smaU dipterous
insect. It has been found in recent times—in Guernsey, J . James,
C. Jackson. Devonshire: Barnstaple, C. Jackson. Yorkshire:
Byland Abbey, G. Monkman; Terrington, O. M.; near Doncaster,
on magnesian limestone rocks, J. Hardy. Cumberland: Furness
Abbey, near Ulverstone, A. Stansfleld. Hampshire, Rev. TK. H.
Hawker. Denbighshire, Mr.T. Pritchard. [Plate LXXXIII B.
FoUo ed. t. XLII, fig. 4].
—crispum irreguläre (M.) is a curiously lohate form, the fronds
having reniform lohes at the base, sometimes throe or four in number,
the margin being also here and there divided deeply so as to become
irregular, some parts being also laciniate and there suhmarginate.
The fronds are often dwarf, and sometimes horned, with a hlunt
terminal lobe. It has been sent to us by Air. WoUaston, and is
apparently of garden origin.
92. crispum latum (M.). This is sometimes caUed crispum
majus in gardens, hut is not the variety first thus designated. It is
remarkable for the great breadth of its fronds, which measure from
three to four inches across, and are somewhat broadest in the centre,
and have a tendency to develope the marginal crenatures into short
pointed lobes ; the base is cordate, one of the lohes sometimes becoming
a Uttle pointed, indicating a tendency towards sagittato-crispum
(8). It has been found in—Devonshire : Barnstaple, C. Jackson.
Somerset: Nettlecombe, C. Elworthy. It is a very fine variety,
hut of course much resemhUng the other crisped sorts, chiefly differing
in its broader fronds.
93. crispum majus (Jackson). This appears to he a distinct form,
and a very fine one, hut we are only acquainted with it from dried
specimens. It seems remarkable for its erect habit, and its six or
eight inch long stiff stipites, which, we are informed, are peculiar to
i t ; the oosta also is very thick; the lamina is fully a foot long, dark
green, the base cordate with very large auricles or lobes, which form
the broadest part of the frond, and measure three inches across;
above these the frond tapers gradually to the apex, tho margin.s
heing friUed eqnaUy ivith the preceding forms. It was found in
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