lohate. Sometimes the fronds are nearly normal in outline, cordate
at the base and deeply crenated in an irregular manner along tho
margins; or occasionally slightly undulated. Tho upper surface
is marked hero and there with distant streaks of yellowish-green.
It was found by Air. AV. AV. Eeeves, near AVorthing in Sussex.
49. salehrosum (M.). An elegant form allied to sinuatum (15)
hut haling shorter fronds, which are sometimes subtruneate, sometimes
cordate at tho base, attennato at tho apex, the margin not
contracted but furnished with unequal rounded lobes projecting
beyond the general outline, the whole including the lobes being
crenately toothed. It was found in Guernsey by Air. James. A
large form having something of the same character found by Air.
Elworthy, has been oaUod ohtusilohatum.
50. projectum (AI.). A large and singular form, of normal size,
the base cordate, or suhsagittate, the margin plane or subundulated
and furnished with distinct broadish acute lobes half an inch
long or more projecting therefrom; the apex is attenuate. The best
form we have seen, subundulate and with more numerous lobes, and
suhsagittate at the base, was found at Ilfraoombe by Air. J. Dodds ;
and others have been sent by Air. Elworthy from Nettlecombe ; by
Air. J. Crossfield from Kendal; by Air. Solater from Newick; by Air.
Eloxam from Tenby ; and by Air. Stansfleld from Scarborough.
51. resectiim (AI.). This is a fine variety, of normal size, remarkable
from the absence of the usual auriculate lobes at the base of
the frond, which are truncate, and somewhat rounded off, thus producing
a land of lanoe-shaped outline. The margin is slightly hut
prettily undulated and sinuately lobed, and the lobes are crenately
toothed. The plants have a tendency to merge into sinuatum (45).
It was found at Littlehampton, Sussex, by Air. AVollaston.
52. 'retinenium (AI.). The fronds of this variety are about nine
inches high, dissimilar, uneven in outline, subcordate or subtruneate
at the base, sometimes multifid at the apex, the margin slightly or
deeply lobed, sometimes in a sinuous manner and here and there
contracted, the more normal parts obscurely crenated. The contracted
and lobate portions are marginate. The fronds are blotched
with pale green, almost amounting to variegation. The veins are
much netted even in the more normal shaped fronds and parts;
this netted venation being tho chief peculiarity of the variety. It
was found in Ireland in 1853 by Dr. Allchin, and is unique.
5-3. viviparum (AVoll.). This plant is of pigmy size. The fronds
are from one to four inches high including the stipites, and fi'om.
half an inch to an inch and a half wide, altogether irregular in
shape, but very conspicuously laoiniate on the margin, and freely producing
bulbillæ both on the fronds and stipites : indeed this variety
affords one of the most remarkable instances of viviparous growth
known amongst British Ferns. The fronds- are sometimes more
regular in form, but are then equally dwarf, and are also undulated
andsinuate-lobate on the margins. The variety was found in 1853 by
Dr. Allchin in the county of Clare, Ireland, and is perfectly constant.
54. opacum (AI.). A curious depauperated looking form, remarkable
for its thick opaque and dull looking fronds, which are from
throe to six inches high, and narrow, but variable in width ; they
are cordate, sometimes unequal at the base, attenuate at the apex,
irregular or sinuous and crenato or sublobate .along the margin,
.sometimes contracted. It was found in Guernsey by Air. Jackson.
55. buUatum (AI.). A dwarf plant about six inches high. The
fronds are an inch broad, the base truncate, and slightly supralineate,
the margin somewhat irregular, crenately or suhsinuately lohate, the
apex attenuated bluntish or forked ; they are sparingly fertile beneath,
and búllate or blistered above, the tissue having a confused opaque
appearance. The veins arc irregular, sometimes netted. It was
found at Littlehampton by Air. AVollaston.
This series might also include tho following varieties, which are
placed in other groups with which they accord in certain peculiarities :
hastatum (6), marginato-fissum (61), marginato-irregulare (62),
coriaceum (71), turgidum (72), turgido-irregulare (73), crenato-
crispum (99), and undulato-projectum (102).
Marginatum Series.
66. supralineatum (AI.). The marginate group of varieties may
be known by having an excurrent membrane developed from the
surface of the frond. In supralineatum the membrane is confined to
the face or upper surface. There are several forms known, some
having but a small portion of each frond, others having one side
1. II
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