TRICHOMANES UADICANS. 



449 



Stipes above hav^ing a narrow membranaceous margin or wing. 

 Kachis margined tliroughout with this membranaceous wing. 



Veins branched, in the sterile fronds terminating within the 

 margin, and in fertile fronds continued beyond the margin, and 

 forming the receptacle. 



Fructification extra-marginal. Involucre cup-shaped. 



The sterile fronds will remain on the plant, if uninjured, 

 for a number of years, and the fertile fronds require several 

 years to arrive at maturity. 



I have large plants growing in great luxuriance, which are 

 grown in large pans filled above the drainage with lumps of 

 freestone, amongst which is a compost of lumps of peat and a 

 moderate sprinkling of silver-sand; when planted the rhizomas 

 were pegged tightly to the peat and stones. These pans 

 were elevated in larger pans filled with water, which made a 

 canal of water round the plants, and the whole placed in square 

 glass frames, having a glass lid to ojien in order to water, 

 which is thrown on the fronds in a small shower every 

 morning. This glass frame is a great advantage over the 

 bell-glass, as the fronds remain untouched. The plants are 

 grown in a shady portion of a greenhouse. 



There are several varieties: — 



Fig. 859. 



Andkewsii, Moore. (Fig. 859.) — Found in Glouin Caragh, 



Ireland, by iNIr. W. Andrews. This variety differs from the 



normal form in having narrower, more lanceolate fronds, in 



the pinnae being more distant and distinct, the involucres 



VOL. II. 3 M 



