212 



ASPLENIUM TRICHOMANES. 



pinnse are very narrow, serrate or laciniate, and near the apex 

 of tlie frond depauperate, causing the spore-cases to be marginal 

 or apparently to be situated on the upper surface. Sometimes 

 part of the pinn^ are absent, at others the apex of the frond 

 is reduced to a mere winged rib. I am indebted to Messrs. 

 Stansfield, of Todmorden, for fronds. 



Imbricatum, Claphatn. (Fig. 570.) — Gathered at Knarbro, 

 in 18G3, by Mr. A. Clapham, of Scarborough. A dwarf variety. 

 Length of frond about three inches, with large pinnse that 

 overlap each other, oblong-ovate, with a square base, having 

 the attachment in the centre, and being distinctly but minutely 

 stalked, the edges of the pinnae prettily dentate. My thanks 

 are due to Mr. Clapham for fronds. 



Fig. 571.— Apex. 



Fig. 572. — Apex. 



Incisum-triangtjlare, Moore. (Fig. 571.)— Found in Ireland, 

 in County Clare, in 1863, by Mr. Stansfield. Another form of 

 incisum, having triangular pinnse. Length of frond four inches. 

 My thanks are due to Messrs. Stansfield, of Todmorden, for 

 examples. 



Incisum-Claphami, Lowe. (Fig. 572.)— Found at Smeerset, 

 near Settle, Yorkshire, by Mr. J. Tatham and Mr. A. Clapham. 

 This variety is included by Mr. Moore under incisum. It is a 

 much finer variety than incisum, and deserves a distinguishing 



