76 POLYPODIUM LONGIPES. 



Fronds pinnatificl in form^ decurrent at the base, coriaceous 

 having three or four broad, oblong, acuminate segments 'of 

 from six to eight inches in length, and of a dark green colour. 



The sori, which are oblong, are biserial, of large size, and 

 immersed within the frond, raising protuberances on the superior 

 surface. 



The rachis and stipes pale green, the stipes being more than 

 half the length of the frond; lateral, attached to a creeping 

 rhizoma. 



P. longipes has fronds from two feet to two feet and a half 

 in length, which are glabrous. 



The present species, and most others having a creeping rhi- 

 zoma, -flourish best if elevated above the pot, as the rhizoma 

 is apt to decay if allowed to become too wet. 



P. longipes is perhaps best known as the Drynaria longipes. 



A scarce Fern, which does not appear to be included in 

 any of the Nurserymen's catalogues, although introduced into 

 England about the year 1823. 



I am indebted to Mr. Henderson, of Wentworth, for a plant; 

 and to the same gentleman and to Mr. Norman, of Hull, for 

 excellent fronds. 



The illustration is from a frond sent by Mr. Henderson, of 

 Wentworth. 



