ASPLENIUM. 
185 
pinnae. The upper margins of the pinnules are irregularly 
toothed. The veins are rather indistinct, and there is no 
midvein ; but a series of veins arise from the base, becoming 
branched in their progress towards the apex, the number 
of ultimate branches usually corresponding with that of 
the marginal teeth. Several sori are produced near the 
centre of the pinna, covered by indusia which open inwardly 
with a jagged or irregularly sinuated margin. 
A common species, confined to rocks and walls, occurring 
throughout Europe and in many parts of North America. 
It is not difficult of cultivation. 
Other names for this plant are the following :—Amesium 
Buta-muraria, Scolopendrium Buta-muraria. 
Asplenium viride, Hudson. 
The Green Spleenwort. (Plate XIII. fig. 4.) 
This Fern has such a general resemblance to A. Tricho- 
manes as to have been mistaken for it by casual ob¬ 
servers. It is, however, quite distinct, and is most 
readily known from A. Trichomanes by the colour of 
its rachis, which is green in the upper part, while in the 
latter it is black throughout. It is an evergreen tufted 
species, producing narrow, linear, simply pinnate, bright 
