218 



ASPLENIUM VIRTDE. 



to the apex of the frond, Avhere minute. Pinnae deeply cut. 

 Sori large and conspicuous. I am indebted to Mr. Clapham, 

 of Ramsdale Bank, Scarborough, for a plant and fronds. 



Imbricatum, Clapham. (Fig. 578.) — A dwarf form of some 

 two inches in length, with imbriate fronds, the apex branching 

 and dilate, and these branches not divided into pinnae but 

 decurrent. Found by Mr. A. Clapham at Settle. I am indebted 

 to Mr. A. Clapham, of Kamsdale Bank, Scarborough, for fronds. 



Incisum, Moore. (Fig. 579.) — Found in Carnarvonshire by 

 Mr. J. Atkins; at Crosby Ravensworth, in Westmoreland, by 

 the late Mr. E.. Clarke; on Whitbarrow by Mr. R. Morris; 

 and on Drummond Hill, Perthshire, by Mr. C. Mc Intosh. 

 Length of frond seven to nine inches. Fronds nearly equal 

 in width from the base to the apex. Pinnae trapeziform, the 

 margin profoundly cut into blunt teeth in place of the usual 

 crenatures. 



m^ 



Fig. 580.— Apex. 



Fig. 581.— Frond. 



Fig. 582.— Apex. 



Crenatum, ClapJiam. (Fig. 580.) — Gathered on Pennigent 

 by Mr. A. Clapham, of Ramsdale Bank, Scarborough. Fronds 

 very variable, some lax and some with crowded pinnae, mostly 

 ramose, and dilated at the apex. In some the pinnae are 

 interrupted, in others depauperate, in some unilateral, in others 

 lax at the base, often imbricate in the centre of the frond, and 

 depauperate towards the apex. Unlike deltoideum, the pinnae 



