145 



ADIANTUM SULPHUREUM. 



Kaulfuss, Hooker. Kunze. 



ri.ATE LXI. 

 Adiantum — Dry. Siilphareum — Sulpliurcou?. 



A LOVELY very rare Fern. 



Native of Chili, Conception, and Peru. 



The fronds, which are ovate in form, are tripinnate ; the 

 pinnules, which are small, are obovate-reniform, petiolulate, 

 glabrous, membranaceous; deep green on the upper surface, 

 and covered with a shining yellow pulverulent substance 

 underneath. 



Sori copious, contiguous, situated in the notch, and somewhat 

 reniform in shape. 



Stipes and rachis glabrous and ebeneous. 



There are two varieties ; in the one (var. minus) the pinnules 

 arc small, and the sori reniform, the length of frond being 

 from four to five inches ; in the other (var. majus) the pinnules 

 are lai'ger, the sori oblong-reniform, and the length of frond 

 twelve inches. 



I believe this species is not in any collection in a living 

 state in this country except in that of Mr. Backhouse, of York. 



The frond illustrated was kindly sent by Mr. Backhouse. 



