Bolton’s woodsia. 
145 
lour, slender and smooth, being quite destitute of hairs. Second 
leaves six or seven pairs, opposite below, alternate above, of a 
triangular figure, obtuse at the corners of three or four of the 
lower pairs, but all of equal size and remote, two or three of the 
upper gradually lessening and growing closer together. Lobes 
of the second leaves most commonly five, two on each side of 
the rib and one at the end ; they are of a roundish figure, grow 
close together, and are obscurely crenated round the margin. 
The colour on the upper side is a brownish kind of green ; the 
underside thickly covered with a brown hairy nap. The lower 
figure represents one of the second leaves as it appeared when 
a little magnified : the seed-vessels are disposed in three or four 
clusters on each lobe, partly hidden among the numerous strong 
brown hairy filaments, by which also the whole under side of the 
leaf, quite to the margin, is thickly covered. The specimen 
above described is very exactly figured on plate 42, and is a 
plant so perfectly distinct from the Acrostichum Ilvense, in its 
usual state, that it seems to me unreasonable to suppose them 
both of the same species. The Acrostichum Ilvense, described 
in the former part of this work, page 14, and accurately figured 
on plate 9, was brought from Snowdon. Oeder, in ^ Flora Da- 
nica,’ has given an excellent figure of the same plant, tab. 391, 
and the figure in Pluk. Phyt. tab. 179, fig. 4 (which is cited by 
Linneus in Flo. Suecica, ed. 2, No. 938), agrees pretty aptly with 
both Oeder’s and my own. But all are very different from the 
Acrostichum alpinum above described. The specimen figured 
on plate 42 was brought from Scotland, but the plant is also a 
native of South Britain, for in a volume of dried plants, col- 
lected by the late Mr. Knowlton, I have seen specimens of the 
same plant with this note in his own handwriting — ‘ From the 
mountains of Wales.’ From these and some other circumstances 
I am induced to think that two species of British ferns have 
been confounded together under the name of Acrostichum llvense, 
and I believe that future observation will confirm the truth now 
discovered.” 
T have quoted the description entire, in order to remove any 
doubt as to the plant now under consideration being identical 
with that he describes, although the testimony of Brown and 
L 
