98 



POLYSTICHUiAI ANGULARE. 



part, being attenuated towards the apex. Length of frond from 

 twelve to twenty-four inches. Acuminate in form, pinnne narrow. 

 Like Angustifrons it is bipinnate. Pinnae sub-opposite below, 

 alternate above. Stipes and midrib very scaly and hairy. The 

 lower pinnules are however distant, and the basal pair alone 

 are stalked and auricled. My thanks are due to Mr. Stansfield, 

 of Todmorden, for examples. 



^Slffi 



X2S 



Fig. G7. 



Decurrens, Moore. (Fig. 67.) — Found at Nettlecombe, in 

 Somersetshire, by Mr, Elworthy. A distinct and very handsome 

 form, having ovate or lanceolate fronds, occasionally multifid 

 at the apex, and stout in texture. Bipinnate. The upper 

 pinna? are more or less contracted, altered in shape, and are 

 fertile, the lower ones being sterile, and more normal in form. 

 The pinnules of the upper pinnae are decurrent, smaller than 

 those of the lower pinnae, more distinct, usually having the 

 auricle developed, but the rest of the pinnule considerably 

 reduced in size. The pinnules of both the upper and lower 

 pinnae are distant; those of the latter are oblong-acute, having 

 a large anterior auricle, and being cuneate at the base, and 

 nearly all decurrent with the rachis, yet in a less degree to 

 those of the upper pinnae. Profoundly, yet somewhat remotely 

 lobato-serrate, with spiny serratures. My thanks are due to 

 Mr. G. B. Wollaston, of Chiselhurst, for fronds. 



