The Cryptogamous Plants of Dr. Roxburgh. 481 



serrate, smooth ; fertile alternate, slender, cylindric. Spikes 

 on longer and more delicate stipes. 



Nat. of Chittagong, near the burning wells at Seetacoond. 



9. POLYPODIUM. 



Fructifications in roundish, scattered, not marginal spots* 

 (generally) with a peltate involucre, separating round the 

 edges. Capsules girt with an elastic ring. 



Section I. — With simple leaves. 



1. P. coriaceum. R. Icon. Roxb. 14, t. 92. P. sphseroce- 

 phalum. Wall. Cat. p. 64^ No. 272, (quod nomen delendum.) 



Parasitic, creeping to a great extent. Fronds undivided, 

 linear-lanceolate, thick and very firm; above polished, un- 

 derneath hoary, with stellate down. Fructifications solitary, 

 (that is in one longitudinal row of large, rather remote, 

 naked spots, on each side, equally distant from the nerve 

 and margin.) 



Nat, of the Malay Islands and Pullo Pinang, whence intro- 

 duced into this Garden by Mr. W. Roxburgh, Jun. 



Parasitic, stems creeping amongst moss on trees, and 

 putrid wood ; rdund, winding, as thick as a crow-quill, im- 

 bricated with numerous, oblong, brownish black, smooth 

 scales ; while young and tender, these end in long, slender, 

 tapering, soft, membranous tails. 



Stipes triangular, channelled on the upper side, polished ; 

 from three to six inches long. 



Fronds linear-lanceolate, most entire, from six to eighteen 

 inches long, of a remarkable firm thick texture, polished 

 on the upper surface; underneath hoary with soft stellate 

 down. 



Fructifications in a single row, of large, rather remote 

 spots on each side, and about equally distant from the nerve 



