rOLYSTICHUM ANGULAR E. 



159 



Triangulare, IVollaston. (Fig. 136.) — Found by Dr. Kin- 

 alian, in Ireland, and was first named Longicaule, but this 

 character is not distinctive. The fronds are elongate-triangular, 

 subtripinnate, foliose, and coriaceous. The pinna; are lanceolate 

 and imbricate; the pinnules large, biserrate, and spinous; 

 crowded. My thanks are due to Mr. C. Elwortby, of Nettle- 

 combe, for fronds. 



BiSERRATUM-iNcoMPLETUM, Moore. — Found at Nettlecombe, 

 in Somersetshire, by ^Ir. Elworthy. This is a large form of 

 Biserratum, having the pinnules somewhat depauperated: they 

 are also here and there somewhat reduced in size, in an 

 irregular manner, and variously misshapen. Length of frond 

 three feet, width six inches in the widest part; equal in 

 width, except at the base, where reduced to four inches, and 

 at the apex, where attenuated, depauperated, and very variable 

 in both width and shape. The pinna; descend to within three 

 inches of the base, there being scarcely any stripes. Densely 

 scaly, some of the scales near the base almost three quarters 

 of an inch in length, and approaching half an inch in width; 

 colour pale brown, and almost transparent. Stipes, rachis, 

 and rachides very scaly. Frond long and narrow; pinnae 

 alternate, ascending, crowded; pinnules biserrate, large, auricu- 

 late, crowded inciso-serrate. The superior basal pinnule twice 

 the length of the others; the basal pair of lobes divided quite 

 to the costa, but not stalked, and the next three pairs of lobes 

 almost as deeply divided; colour deep rich green. A fine 

 robust Fern, differing chiefly in the incomplete character of 

 its pinnae and pinnules near the apex of the frond. It is 

 unnecessary to give an illustration, as it is so closely allied 

 to Biserratum. My thanks arc due to Mr. Charles Elworthy, 

 of Nettlecombe, for fronds. 



