NEW OR INTERESTING MALAYAN FERNS. 



by Capt. C. R. W. K. van ALDERWERELT van ROSENBURGH. 



(July, 1908). 



In the collections of non-determined malayan ferns of' the 

 Buitenzorg Herbarium I found several forms not considered in 

 different papers on ferns of the Malay Archipelago, and some few 

 specimens erroneously labeled with the names of described forms. 

 Probably most of them are new. 



CYATHEA. Smith. 



Cyathea cycloclonta. t\ M. v>. Mi.; Alsopküa cyclo- 

 donta, Ghrist, in Ann. Btz., XX, 137. 



Indusium very distinct, at length a shallow, deeply and 

 irregularly k>bed, membranaceous, persistent, brown cup. 



Borneo (Nieuwenhuis No. 1105). 



C yatliea riinensis, t\ A. v. R. 



Frondes amplae, 3-pinnatifida3, coriacea3, glabraa, rachide 

 inermi, supra setacea, pinnis ± 55 cm. longis et 22 — 25 cm. 

 latis, pinnulis sessilibus, acuminatis, ad basin 2 — 2 1 / 2 cm. latis, 

 pinnatifidis, laciniis oblongis, subfalcatis, subobtusis, crenatis, 

 margine leviter recurvatis, venis + 8 utrinque, inferioribus 

 furcatis, soris in venis medialibus, numerosis, indusiis in fragmenta 

 irregulariter rumpentibus. 



Pulu Run (Teysmann). 



