48 



ATHYRITJM FILIX-FCEMINA. 



twelve inches in length, narrow, irregular. The pinnaj tapering, 

 but not acuminate. Pinnules unequal and irregular. An 

 illustration is not needed. 



Fig. 338.— Pinna.' 



Eroso-decurrens, Moore. (Fig. 338.) — A dwarf form, 

 scarcely a foot in length, and two inches in width. Slender 

 and thin. Pinnte descending in the lower half of the frond, 

 and ascending and curving in the upper portion, their apices 

 ending abruptly, and much lacerated. Pinnules decurrent and 

 erosc, and very various in size, sometimes wanting. The apex 

 of the frond dilated, with a branching much-laciniated terminal 

 pinnule. The illustration is from Messrs. Stansfield. 



Fig. 339.— Pinna. 



Exile, Moore. (Fig. 339.) — A dwarf form from Todmorden 

 and from Antrim, found by Mr. A. Stansfield, and in Levens 

 Park by Mr. Barnes. Less dej)auperate than lacmiatum, and 

 more slender than dissectum. Pinna} irregular, narrow, and 

 long-pointed; pinnules unequal and linear-oblong, profoundly 

 pinnatifid, having occasional enlarged lobes prodiicing ramose 

 pinnules. Dentation short and blunt. I am indebted to Mr. 

 Barnes for fronds. 



