124 POLYPODTUM PLUMULA. 



The form of the frond is lanceolate, sub-pinnate, with numerous 

 linear parallel horizontal pinnae — about fifty-five pair of pinnae 

 on a frond of ten inches in length. 



The frond, which is lateral, is articulated on a creeping 

 rhizoma. The bottom half of the frond is equal in width, 

 after which it gradually tapers to a point. 



Stipes and rachis black, and covered with small thin scales. 



Length of frond varying from six to ten inches; colour a 

 delicate pale green. In one, ten inches and a half in length, 

 only two inches are naked; width of frond three inches and a 

 quarter. 



Sori uniserial, and occupying the upper portion, and some- 

 times the whole of the frond; colour golden yellow, situated 

 near the edge of the frond. On a large pinna there are about 

 thirty pairs of sori. 



I have ventured to include P. plutnosum, of Presl, as one of 

 the synomes of P. plumula, from the similarity of the fronds: 

 it does not appear to be anywhere described, consequently 

 it has been considered as a misprint. 



My thanks are due to Mr. Sim, of the Foot's Cray Nursery, 

 Kent, and to Messrs. Rollisson, of Tooting, near London, for 

 plants of this species, and to Mr. Henderson, of Wentworth, 

 for fronds. 



It is in the Fern Catalogues of Messrs. Parker, of Hollo way; 

 E. G. Henderson, of St. John's Wood; Booth and Son, of Ham- 

 burg; Pollisson, of Tooting; Sim, of Foot's Cray; A. Henderson, 

 of Pine-apple Place; and P. Kennedy, of Covent Garden. 



The illustration is from a plant in my own collection. 



