108 



POLYSTICHUM ANGULARE. 



pinnules varying in a considerable degree both in form and 

 size; at tlie basal portion of tbe frond there are a few divided, 

 as in Suhtripinnatum, but as they approach the apex they 

 become less and less divided. The pinnules are incised in 

 various ways, and are irregularly laciniated, and occasionally 

 depauperated; the segments are serrated, and the basal anterior 

 ones auricled. A smaller variety has been found in Sussex, 

 by Dr. AUchin: it differs in occasionally having the epidermis 

 on some of the pinnules disrupted. Examples have been 

 furnished by Mr. G. B. WoUaston, of Chiselhurst. 



Fig. 80. 



Interruptum, WoUaston, (the same as var. Laciniatum of 

 Wollaston, but of a different normal form.) (Fig. 80.) — Found 

 at Oldstead, Yorkshire, by JVIr. Charles Monkman, of ]Malton. 

 A very handsome, constant, and very singular form. The 

 fronds, which are from twelve to eighteen inches in length, 

 are narrow, ovate-lanceolate in shape. The rachis of great 

 length, — almost half the frond. The pinnae varying in length 

 in an extraordinary degree, being irregularly shortened; some 

 as long as three inches, and others only half an inch. The 

 pinnae frequently wanting. Pinnules auricled, pra^morse, and 



