36 HOW TO KNOW THE FERNS 



side of the rachis, and these are usually very 

 distinctly lobed. If examined with a magnify- 

 ing glass it will be seen that the edges of the 

 pinnules are bordered with bristling points. 



In the case of the Tunbridge Filmy Fern, 

 the sporangia are gathered in a little cup 

 formed by the margin of the leaf ; these are 

 present at the end of the veins which branch 

 out from the mid- veins of the pinnae. 



The Tunbridge Filmy Fern has a very wide 



Hymcnophylhun tunbridgense. The Tunbridge Filmy Fern. 



distribution in this country. As a rule the 

 plant grows intermingled with moss, and on 

 this account it is often passed by without 

 recognition. Almost everywhere where there 

 are wet and especially water-splashed rocks 

 one may expect to find this species. The 

 Tunbridge Fern can only be cultivated in the 

 same manner as that indicated in the case of 

 Trichomanes. The plant is evergreen. 



Hymenophyllum unilaterale. The specific 

 name is, of course, a Latin word meaning 



