78 PLATYLOMA SAGITTATA. 



A somewhat deciduous, warm greenhouse Fern, from Mexico. 



Raised from spores at the Royal Gardens, Kew, in the year 

 1842. 



Fronds triangular, bipinnate; pinnules cordate-lanceolate, 

 having the singular property of rolling the margins under, and 

 thus becoming arrow-shaped; stalked, smooth, glaucous. 



Sori linear, continuous, broad; indusium narrow. 



Rachis and stipes pale brown, lateral, adherent to a brief- 

 creeping rhizoma. 



Length of frond from eighteen inches to two feet; colour 

 glaucous green. 



My thanks are due to Mr. Sim, of Foot's Cray, for a plant 

 of this species; and to M. Schott, Director of the Imperial 

 Gardens at Schonbrunn, near Vienna; Mr. J. Henderson, of 

 Wentworth; and to Mr. Norman, of Hull, for fronds. 



It is in the Fern Catalogues of Messrs. Sim, of Foot's Cray; 

 Rollisson, of Tooting; Veitch, Jun., of Chelsea: A. Henderson, 

 of Pine-apple Place; Parker, of Holloway; Booth, of Hamburg; 

 Kennedy, of Covent Garden; and Stansfield and Son, of the 

 Vale Gardens, Todmorden. 



