LASTREA FILIX-MAS. 



271 



G. B. WoUaston, who remarks that it has not been sufficiently 

 long in cultivation to speak of its merits, hut it appears to he 

 the least cristate variety yet found, and yet has sufficient 

 characters to shew that under certain conditions it will be 

 dichotomous in its principal members, namely, the apices of 

 the frond and pinna?. 



Fig. 221. 



Atro-viridis, Jertis. (Fig. 221.) — Mr. Swynfen Jervis, who 

 was the finder of this variety in Staffordshire, feels very 

 doubtful whether it be a variety of Lastrea Jilix-mas. Its 

 coriaceous structure and permanently dark and subevergreen 

 habit is strong proof that it is not so; but Mr. G. B. 

 Wollaston, who has taken great notice of this form is of a 

 different opinion. It is a fine, robust, and symmetrical variety 

 with sub-bipinnate fronds, scarcely ever attaining a length of 

 eighteen inches. The lobes subimbricate, rounded, and larger 

 at the summit than the base. Its general appearance is 

 intermediate between Lastrea Jiliz-mas and Lastrea pseudo-mas, 

 Wollaston. 



Paleacea, Moore. — This is Lastrea pseudo-mas of Wollaston, 

 described on page 253; there are several varieties too nearly 

 allied to the normal form to be described. The most compact 

 form is found about Ambleside, and in many places in 

 the lake district, as well as at Chaigeley Manor, Lancashire, 

 and Matlock, Derbyshire. This I have figured under the 

 original name. The pinna? are shorter, and broader for their 

 length, approximate, the pinnules are also approximate. There 

 is a marked difference between this form and the normal form 



