THE COMMON HARTS-TONGUE FERN 
these portions having the short distinct teeth or the shallow lobes of the polyschides type, while here and 
there other portions 
мч out to the normal width, and form blunt, rounded, or oblong projecting lob 
ог entire normal spaces of 
ater length. Sometimes the apex, or the base, or one sido only, of the 
frond is affected ;-the examp broken 
figured showing an instanco in which the altered portions are k 
up than usual, Seareely two fro 
Is are alike, but the fronds are nearly always affected. It has been 
found in North Lancashire by Mr. Wollaston, in Yorkshire by Mr, Clapham, and in Devonshire by the 
Rev. J. M. Chanter 
irregulare (М), 
untable freaks of nature which is at one time in its 
natural growth, and then in its most fantastic; or the two conditions may be combined on the same 
plant, "The abnormal fronds a 
irregularly lobate, with erenated or incised lobes, somewhat undulate, 
often forked, and altogether irregular, It is but sparingly fertile in the abnormal state, It was found 
in Guernsey by Mr. C. Jackson, and is only a sub-permanent form. 
18, corrugatum (W.) presents a combination of tho characteristics of variabile (30) and erispum (40), 
having fronds beautifully undulated, but also deeply cut into auriculato lobes on the margin, in a very 
irregular manner, ‘The venation is slightly reticulate, Found in Sussex by Mr. Wollaston in 1854, 
19. pocilliferum (ML). А large irregularly-lobed form, stout and rigid in texture, often forked, and. 
somewhat supra-marginate 
chief peculiarity, however, is the production on its under surface, 
ır trumpet-shapod exereseenees, frequently a quarter of an inch 
by Mr. J, J 
b. Te was sent to us from Gi 
in lengt mes, of Vanvert 
20. submurginatum (М7). This form comprises several modifications, in which the fronds, var 
in character, sometimes bifureate, more rarely ran 
are only partially marginate: the perfect 
fronds are submarginate, that is, with their margins partially disrupted, erenato-lobate, especially 
towards the apex, supra-soriferous ; the imperfect fronds 
netimes similar to tho perfect ones on one 
side of the rachis, and on the other narrow and trobly dentate; others are truncate, submarginat 
and obliquely cornute ; and others again abortive, having nothing but a short scaly stipes without any 
ound in Sussex, in 1854, by Mr. Wollaston ; in Ireland by Dr 
of the leafy portion, This form w 
Allehin ; in Guernsey, by Mr. С. Jackson; and in the Islo of Wight, by Mr. R. Bloxam, 
21. siciforme (W.). This is, perhaps, the most slightly margi 
rred to the 
marginatum group. The from а foot long, are lance-shaped, laterally waved or 
te, and obsoletely, though continuously, marginate beneath. "hey are also 
subflexuose, sig 
tification protrudes itself to the faco of the frond, but the upper 
soriferous, that is, the 
supra-soriferou 
are very small. The base of the frond is rarely auricled, and the whole plant has a very unusual 
pearance, Tt was found in Guernsey by Mr. C. Jackson, in 1854, and is doubtless a constant form. 
many of the characteristics of submarginatum (20), 
92. microdon (ML) is n small form, possessing 
pex of the frond muli, Its chief peculiarity is the minutely sulcate portion of the 
but having the 
w the forking, Found in Ireland by Dr. Allchin, in 1853, and quite constant. 
frond immediately b 
ium (20) in size and in its submarginate frond, 
23. contractum (W.). This variety resembles өнім 
and microdon (22) in its multifid apex. Tt has been named contractum on account of having its fronds 
ist-like just below their donsely-multiñd apices; the mass of veins which have to 
drawn in*or w 
that part the appearan 
pass this contracted portion, become protruded or ridge 
md in Clare, Ireland, by Dr. Allehin, in 1859, and is pe 
arki 
зае 
supra-lineate, "This also was 
form of the mar 
inate group, and although 
24. marginatum (М). Thisis the type and most re 
known, as a garden specimen received from the younger Linnaeus 
been lo 
but recently noticed, must have bee 
arium, Several subforms are known in cultivation, of which the most marked 
is in Sir J. E, Smith's Hi 
in our Handbook of British Ferns: “The fronds grow erect a foot or 
they are simple strap-shaped, the margin 
more in height, and stand in a circle round the crown 
irregularly lobed, the under surfaco producing within Ше margin an excurent membrane, which is a 
1 rfaces of this membrane, and tho under surface of the frond itself exterior to it, are 
