THE COMMON POLYPODY 
4. interruptum, as its name implies, has the lobes interrupted or irregular, sometimes two, three, or 
four entirely wanting ; they are also irregularly bifid or multiid, or curiously laciniated ; the outline 
of the frond is lincar-lanceolate, 4 е, normal. "This variety is rare 
5. sinuatum is а form allied to the last named, but very distinct; the 
lobes are beautifully 
sinuous or waved, rarely divided at the apices as in interruptum, but irregularly lobate, the 
bes sharply 
serrate, It is a rare form, and under culture for some years, has proved permanent, ‘The fronds are of 
the usual outline 
6. laciniatum : in this variety the lobes are of 
different lengths, and simply but irregularly 
notched, and somewhat erisped or reflexed. 
7. marginatum : this form of variation is occasional but rare in Polypodium, though fre 
‚Seolopendrium. Its peeuliarity consists in the splitting of the epidermis on tlie margins of th 
and in its reeeding, generally on the under side of the frond, towards the midvein; the lobes themselves. 
are irregularly serrate, Otherwise the fronds are normal 
8. serrulatum is a rare variety, having the teeth of the lobes minutely serrate; it has been 
generally met with 
ing on the trunks of trees. The plant is rather dwarf in habit, with fronds 
of the normal outline ; and has for some years proved constant under cultivation. [It was found in 
Devonshire by Mr. Wollaston: 
9. multifidum is generally like the normal form, or the variety serratum, except that the apex of 
the frond is bifid or multifid 
10. auritum : the peculiarity of this variety consists in the lobes not being simply decurrent, but 
forming a broad wing to the rachis; and the first lobules next Ше rachis on the upper margin (not, as 
is more usual, the lower,) are greatly enlarged, formin 
a kind of car, from which it takes its name 
‘The outline of the fronds is norma 
11. serratum ; the lobes in the most typical state of this form are sharply and deeply serrate ог 
even biserrate along their margins, and the ар rather a common form of the species, 
With fronds nearly of the usual outline, and with a tendency in the sori to become oblong. Tt varies, 
however, with the fronds rather broader, and the teeth rounded and sometimes partially enlarged into 
lobes, thus connecting this form with the variety crenatum. 
12, denticulatum : this form has fr 
nds less coriaceous than usual, of a broad oblong outline, abrupt 
most lobes being scarcely shorter, and caudate at the apex ; all the lobes 
re ascending, 
4d distantly sharp-toothe 
Tt was found near Hereford. Analog 
ous forms occur in Portugal, and 
orth America 
13. oratum : this is allied to the last mentioned, but the fronds, which vary in size, are ovate rather 
» oblong ; they are more coriaceous, with the lobes 
nore obscurely toothed or erenelled ; the lower 
most. lobes are horizontal, and the upper o 
decrease in size, It seems to be common in Madeira 
and the Azores; and has been gathered 
y Dr. Allchin at Ballavaughan, in the west of Ireland, 
14. erenatum : this is us 
ly a large form, approaching semilueerum by its broad or ovate fronds, 
and often, lobed segments, Те varies considerably ; in some instances approaching serratum ; in o 
instances having the lobes more or less deeply and unequally erenate or erenato-lobate ; and sometimes 
having 
һе sori oblong, The notches of the lobes are rounded, not acute, as in serratum; and the lobes 
themselves are in 
ed or undulated. It is not common, but is found in 
Kent, in Surrey, and in Wales ; the most m 
rked examples being those from Saltwood found by Mr, Gray 
and those from Conway found by Dr. Allehin, ‘The finest undulated form is a 
ion plant of obscure 
history, but one nearly identical and which will probably become quite so under cultivation was found 
by Dr. Allehin at Mueruss, in Ireland. 
15. truncatum 2 this is generally a more compound form, appro being 
Ч or lobed, and the lobules minutely Dut in 
the development of the frond is, from some unknown cau 
