NEW OR INTERESTING MALAYAN FERNS. 



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



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(July, 1908). 



In the collections of non-determined malayan ferns of the 

 Buitenzorg Herbarium I found several forms not considered in 

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

 spécimens erroneously labelecl with the nanies of described forms. 

 Probably most of them are new. 



CYATHEA. Smith. 



Cyatliea cyclotlonta. i\ A. v>. tt.; Alsophila cyclo- 

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



Indusium very distinct, at length a shallow, deeply and 

 irregularly lobed, membranaceous, persistent, brown cup. 



Bornéo (Nieuwenhuis No. 1105). 



Cyathea runensis, r. A. i\ H. 



Frondes ampla3, 3-pinnatifida3, coriaceœ, glabrae, rachide 

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

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

 pinnatifidis, laciniis oblongis, snbfalcatis, subobtusis, crenatis, 

 margïne leviter recurvatis, venis + 8 utrinque, inferioribus 

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

 irregulariter rumpentibns. 



Pulu Run (Teysmann). 



