ASPLENIUM. 
138 
in a narrow fan-shaped manner, in each of the larger 
pinnaB, the smaller ones having a proportionately less 
number. Two or three linear sori are produced on a 
pinna, and these are covered by membranous indusia, the 
free margin of which is entire, or slightly sinuous, but not 
jagged ; the sori at length become confluent. 
It grows, but very rarely, in Scotland, and in the Lake 
district ; and is found, but with a limited range, in other 
parts of Europe. 
This kind is not only rare, but one of those which does 
not freely yield to artificial culture. It grows tolerably 
freely if potted in sandy peat-soil well drained by an 
admixture of rubbly matter, and kept under a bell-glass in 
a shaded frame or greenhouse ; but the plants are very 
liable to die in winter. The safeguard is, not to allow 
any water to lodge about their crowns, nor to keep the 
bell-glass too closely or too constantly over them, especially 
in winter. 
This species is often named A. alternifolium by British 
authors ; but the name we have adopted claims precedence. 
It has also been called Aspleiiium Breynii^ Amesium 
germanicum^ and Bcolopendrium alternifolium. 
