POLYSTICHUM ANGULARE. 83 



above, mucli paler beneath. Stipes very scaly. The coriaceous 

 textui'e of the fronds, and their abrupt termination, as well as 

 those of the pinnae, and the palmately lobed pinnules, render 

 this highly interesting Fern very distinct. The fronds were 

 forwarded by Messrs. Stansfield, of Todmordcn. 



Fifr. 50. 



Depauperatum, 3foore. (Fig. 50.) — A dwarf proliferous Fern, 

 found in Ireland, by Dr. Kinahan. The fronds are depauperated 

 so as frequently to resemble mere skeletons, little else than the 

 ribs remaining, and even these irregularly developed. Some 

 fronds are less affected than others, and in these the pinnules 

 are cuneate at the base, and above are serrated with lengthy 

 subulate teeth. My thanks are due to Mr. Sim, of Foot's Cray, 

 for fronds. 



Imbricatum, Moore. (Plate XVII. — B.) — A most interesting 

 and graceful variety, found in Somersetshire by Mr. Elworthv. 

 In habit resembling Polystichum aculeattim, var. lohatum. 

 The fronds are narrow, and twenty-four inches in length, and 

 linear-lanceolate in form; the pinnae being blunt, short, and 

 linear-oblong. The pinnules crowded, blunt, rounded-oblong in 

 shape, imbricated, and not much narrowed at the apex. Spi- 



N 



