450 TRICHOMANES RADICANS. 



quite sunk in the margin of the frond, instead of being 

 almost stalked as in the normal form. The stipes is also 

 more elongated and less marginal winged. 



DiLATATUM, BacJcJwuse. — A form resembling the Hymeno- 

 phyllum dilatatum which Messrs. Backhouse, of York, have 

 procured from Ireland, having large very dark green fronds, 

 with much less divided pinnules, which are broadly winged. 

 I am indebted to Messrs. Backhouse for a plant. 



Alatum, Backhouse. — A conspicuously-winged variety, found 

 in Ireland. I have not seen fronds of this Fern. 



FiJRCANS, Loive. (Plate LXXII. — A.) — Found in Ireland. 

 Differing merely in being branched. As yet it is uncertain 

 whether it will be a permanent variety. 



