

222 THE BRITISH FERNS. 
narrowed in portions of their length, and having longer projecting 
segments occurring at irregular intervals. The fertile fronds are 
correspondent in character, being sometimes nearly or quite normal, 
and sometimes interruptedly abbreviated in the segments. As in 
many other varieties of monstrous character, the plants, though 
not having all the fronds affected, nevertheless constantly produce 
affected fronds. It was found near Tunbridge Wells, Kent, in 
1853, by Mr. Wollaston. Similar forms have been found at 
Todmorden, by Mr. T. Stansfield, and at Ilfracombe, by Mr. J. 
Dodds. [Plate XCV A.—Folio ed. t. XLIII C, fig. 2.] 
11. ramo-depauperatum (Stansf.). The sterile fronds of this 
variety are linear below, with short rounded toothed segments, and 
interrupted above, some of the segments being short and rounded, 
and others unequally elongated, the apex being dilated. In this 
state it resembles coneinnum, except in the tendency to become 
forked at the tip. It is, however, described by Messrs. Stansfield, of 
Todmorden, as being usually but variously forked and branched, 
and when in this state must be an elegant form. It was found in 
the Clova Mountains in Forfarshire, by Mr. J. Horsfall. 
12. projectum (M.). The sterile fronds of this form are very 
narrowly linear lanceolate, the base and apex being tapered off, 
and the centre portion less than half an inch in width, the lobes 
throughout with a few exceptions being bluntly rounded: these 
exceptions consist of a lobe or segment here and there developed 
into the usual linear-oblong obtuse form; thus the fronds appear to 
be symmetrically narrowed, but with a few prominent lobes project- 
ing beyond this narrowed outline; quite different, however, from 
the irregular narrowing which occurs in heterophyllum (10), and 
concinnum (9). It is reported to be constant, but only sterile fronds 
are known. It is stated to have been found in the neighbourhood 
of Ben Lawers, in the Scottish Highlands, and was communicated by 
Messrs. Stansfield of Todmorden. 
18. interruptum (Woll.). This variety is variable in its growth. 
Some of its fronds are multifid or irregularly ramose towards the 
apex; others are normal in their general outline, but with the 
segments here and there depauperated, and occasionally they are 
unilateral near the top with the rachis bent down at the apex in a 

