82 POLYPODIUM HENDERSON I. 



Mr. Joseph Henderson, of Wentworth, has several splendid 

 specimens of this Fern. 



Fronds glabrous, simple, linear, erect; margin slightly revo- 

 lute, coriaceous, sessile, being decurrent within an inch of the 

 rhizoma, and then terminating with a thickened edge to the 

 stipes, but sometimes decurrent quite to the rhizoma; apex and 

 base attenuated gradually; veins hid; fronds nearly all fertile. 



Length of frond thirteen inches; width scarcely a quarter of 

 an inch; colour yellowish green. 



Rhizoma scaly; veins immersed, and difficult to see, yet there 

 is no doubt that it belongs to the section Cyrtophlehium, 

 f Campyloneiiron of Smith.) 



Sori medial, uniserial, from one hundred to one hundred and 

 twenty pairs of sori on each frond, smaller than in P. angus- 

 tifolium, and never biserial or irregular as in that species. 



The present Fern differs from P. a7igustifolium also in being 

 much narrower, more rigid, more sharply attenuated towards 

 the apex, more contiguous, straight, shorter, and more compact, 

 in not having the comparatively broad barren frond of that 

 species, and in being erect and uniserial. 



An evergreen stove Fern, cultivated by Mr. J. Henderson, 

 of Wentworth, but where from not known. 



I am indebted to Mr. Joseph Henderson, of Wentworth, for 

 a plant and fronds of this species. 



It is not in any of the Nurserymen's Catalogues. 



The illustration is from a frond sent by Mr. J. Henderson. 



