THE COMMON HARTS-TONGUE FERN 
soriferous, ‘The fronds have therefore, as it were, a double margin. In the less perfectly developed 
condition the membrane is reduced to a longitudinal vein-like ridge.” This variety was found near 
re, by Mr. Elworthy, gardener to Sir W. С. Trevelyan, and sul 
Nettlocombe, in Somers quently 
near Selworthy, in the same county, by Mrs, Archer Thompson. It has since been gathered in Sussex, 
by Mr. Gray and Mr. Wollaston; and still more recently in the Isle of Wight, by Mr. R. Bloxam 
veral forms) ; and at Enys Penryn, in Cornwall, by Mr. G. 
tho Rev. J. M. Chanter ( 
been found near Brecon, by М 
cession of Mr 
Dawson, A narrow form hi There is also a plant of this 
character, with multifid apices, in the which was sold to him in 1849 by 
Potter, a well-known di cannot be traced ; from this the variety 
proliferum (2 well as plants exac 
D 
25, proliferum (W.). This curious little monstrosity, as before stated, was raised from the spores of 
the multifid marginatum (24) in 1851, and the plants now in 1856 (with the exception of those that have 
been grown in heat), are of the most pigmy dimensions, the largest not having attained three inches in 
length. ‘The fronds in general outline are either small strap-shaped, truncate, calyciform, cornute, or 
subulate, but all, with the exception of the last ply and irregularly marginate, almost to the 
ond in two, The exeurrent membrane is the same as in the last described, but more 
dividing of the 
developed in proportion, and the upper surface of the frond is irregularly verrucose. Hitherto there 
has never been any appearance of fructification, but in lieu thereof curious little bulbil-bearing cysts 
have appeared on the surface of the frond, pro generally from those parts where the spiracles 
breathing tubes terminate, These form minute plants exactly the counterpart of the parents. ‘This 
bulbil-making process Mr. Wollaston thinks is more or less common to all, when from some unknown 
eause the normal mode of propagation fails, This variety is becoming not uncommon. 
26. fimbriatum (Allehin), This unique variety is connected by easy steps with bimarginatu 
ds besides the usual hooks and points peculiar to this group. The first are about 
ularly frille 
bears two sorts of fi 
three-quarters of an inch in breadth, and from six t 
the sori rarely pass the exeurrent membrane, which is the 
twice crenato-lobate, unduln mo as in other 
marginate forms. ‘The second sort of frond is very narrow, about a quarter of an inch wide, and from 
nine inches to upwards of a foot in length, and more nearly resemble a winged rachis than a frond, the 
ame width as the rachis itself; the margins are the same as 
leafy part on either side being about the 
the others, but more minutely divided, and the disrupted membrane recedes even to the rachis itself 
It isa very neat and curious variety, and was found by Dr. Allehin in Guernsey in 1849, 
bimarginatum (W.). One of the most curious and rare varieties known, The fronds are linear 
strap-shaped, sometimes multifid, about a quarter of an inch wide, and nearly a foot long; some also 
are three quarters of an inch wide, and from six t 
g. On the under side the excurrent 
membrane appears as in other marginate forms; but besides this, on the upper surface of the frond, the. 
eutiele is gathered and puckered up into cavities and nodules; and some of the lower veinlets 
most remarkable calyeiform 
rachis aro covered with hair-like scales, Tt seems a very tender variety, affected by the least frost, and 
very rarely perfects its spores. Tt was found near Rotherham, in Yorkshire, about five уст» ago, by 
Mr. Н. Hayling, under gardener to the Rev. W. Hudson, of St, Catherine's, Regents park, and wa: 
exhibited at the Horticultural Society's Rooms, in Regent-strect, by Mr 
Kennedy of Covent Garden, 
28, scabrum (W.). Тһе fronds of this variety resemble the wider fronds of bimarginatum (27), but are 
even much wider and longer, and the whole plant is of more vigorous growth. ‘The face of the f 
and not quite so much drawn into cavities. ‘The margins are 
articularly towards the apex of the fronds. Unlike the 
her it is abundantly fertile, It was found 
in Ireland, in 1853, by Dr. Allehin, and is a singular and rare variety 
29. constrictum (ML). This curious form, has not been proved, but 
so remarkable as t 
recording. ‘The fronds are medium-sized the upper half broad, and searcely differing from the normal 
