80 



POLYPODIUM RIGIDUM. 



Sori irregular, at first diminute and whitish, becoming gradually 

 larger, and at length, when mature, bold and reddish brown 

 in colour. 



Length of frond from twelve to fifteen inches; width three- 

 quarters of an inch; colour rich dark green, paler beneath. 

 Stipes one inch and a half in length. 



My thanks are due to Messrs. Rollisson, of Tooting, and 

 A. Henderson, of Pine-apple Place, for plants of this species; 

 and to M. Schott, of the Imperial Gardens of Vienna; Mr. 

 J. Smith, of the Royal Gardens, Kew; and Mr. T. Moore, 

 of the Chelsea Botanic Gardens, for fronds. 



It can be procured from Mr. R. Sim, of Foot's Cray; 

 Messrs. A. Henderson, of Pine-apple Place; and Messrs. Rollis- 

 son, of Tooting. 



The illustration is from a plant in my own collection. 



Barren Frond of P. angustifolium. (Sec next page.) 



