76 
rEKSTT COMBES. 
Yar. serrulatwn “has the teeth of the lobes or 
pinnae minutely serrate” (Moore). Pound in De¬ 
vonshire by Mr. Wollaston, and by ourselves at 
Mortehoe. 
Yar. denticulatum has the edges of the pinnae 
sharply and regularly toothed. 
Yar. serratum has the pinnae deeply notched or 
toothed. 
Yar. crenatum somewhat resembles serratum , but 
is more deeply and broadly notched, and sometimes 
lobed. 
Yar. semilacervAn has been found at Berry Po¬ 
meroy Castle, in South Devon; Mr. Moore thus 
describes it:—“ The fronds are elongate ovate, 
very beautifully and symmetrically divided: the 
primary lobes being themselves lobed, and in some 
instances the lobules again divided or serrated.” 
This variety has been known some years under the 
name of Hibernicum , having been first noticed in 
Ireland. 
Yar. Cambricum, a still more divided form, was 
named by Linnaeus. It is always barren. The ori¬ 
ginal plant was found in Wales; this is not found 
in Devon, but being a well-known form, some slight 
notice was deemed necessary. 
