52 ADIANTUM INTERMEDIUM. 



A native of tropical America, — Brazil, Ilhios, Guiana, Amazon, 

 New Grenada, Mexico, Guayaquil, Peru, West Indian Islands, 

 Jamaica, Trinidad, Dominica, and Guadaloupe. 



The fronds are bipinnate, pinna? oblong-acuminate, from five 

 to seven lateral ones, horizontal, the terminal one being elon- 

 gated; pinnules ovate-oblong, obtusely acuminate, wedge-shaped 

 at the base, the upper base being parallel with the rachis. 

 Sterile pinnules obscurely lobate, serrate. The fertile pinnules 

 have a serrated apex. 



Stipes angular, ebeneous, rachis ferrugineo-hirsute, attached 

 to a creeping elongate caudex. 



Sori large, oblong, numerous. 



Length of frond from one to two feet, colour deep green. 



There are several Ferns very nearly allied to this. A. pri- 

 ojiophyllum, Hooker; A. fructuosum, Hooker; A. triangulatum, 

 Kaulfuss. 



My thanks are due to Messrs. Rollisson, of Tooting, for a 

 plant of this Fern; and to Messrs. Henderson, of Wentworth; 

 Mrs. Riby, of Papplewick; Messrs. Booth, of Hamburg; Messrs. 

 Stansfield and Son, Vale Gardens, Todmorden; and Mr. Nor- 

 man, of Hull, for fronds. 



It is in the Fern Catalogues of Messrs. Booth, of Hamburg; 

 Masters, of Canterbury; Rollisson, of Tooting; Veitch, Jun., of 

 Chelsea; Stansfield, of Todmorden; and Parker, of Holloway. 



The illustration is from a frond given to me by Mr. J. 

 Smith, the able Curator of the Royal Gardens, Kew. 



