44 POLYPODIITM PERCUSSUM. 



the soil, or they are very apt to decay, consequently many 

 plants are lost through improper planting. 



An evergreen stove Fern. 



Native of Brazil, Tropical and South America, Surinam, St. 

 Catharine, and Peru. 



Introduced into the Koyal Gardens, Kew, in the year 1842, 

 having been received from Mr. Henderson. 



Fronds nearly erect, simple, lanceolate-acuminate in form, 

 cuspidate, coriaceous; base attenuated, the surface covered every- 

 where with small peltate, fimbriate scales. Lateral, articulated 

 on a scaly, creeping, thin rhizoma. 



Length of frond from six to twelve inches; breadth one inch 

 and a half; colour bright green and shining, paler beneath. 



Sori large and bold, uniserial, situated in dense compact tufts 

 of narrow scales. 



I am indebted to Mr. R. Sim, of Foot's Cray, for a plant 

 and fronds of this Fern. 



It is in the Catalogues of Mr. E,. Sim, of Foot's Cray; Mr. 

 J. Veitch, Jun., of Chelsea; and Mr, Kennedy, of Covent Garden. 



The illustration is from a plant in my own collection. 



