NEW OR INTERESTING MALAYAN FERNS 4. 



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



The diagnoses of the new Papuan species are provisory only ; 

 more detailed descriptions will be published elsewhere. 



Buitenzorg, December 1911. 



Adiantiim lioHiaiicliae. r\ A. v. H, 



Eu-adiantmn, Polysoria. — Frondes longi-stipitatae, confertae, 

 ovatae, ca 20 — 25 cm longae lataeque, ramosae, rachidibus ni- 

 tentibus, atro-purpureis ; rami infra ramum terminalem ca 2 — 3 

 utrinque, lineares, ca I21/2— 171/2 cm longi et 1V2~2 cm lati, 

 apicem versus angustati, infimi basi furcati, ramulo postico breviore. 

 Foliola coriacea, glabra, supra nitentia, subtus plus minusve 

 glauco-opaca, dimorpiia, dimidiata, majora ca ^/4— 1 cm longa, 

 5 — 6 mm lata; foliola sterilia oblonga, basi cuneata, apice rotundata, 

 margine (exteriore et superiore) denticulata et pellucida, venulis 

 in sinibus denticulorum terminantibus; foliola fertilia trapeziformia, 

 (superiora cuneata) apice oblique truncata. Sori transverse oblongi, 

 sublineares, sporangiis ad venulas tantum ortis, indusio coriaceo, 

 in sicco ruguloso. 



New Guinea (near Hollandia Camp, djellerup No. 946). 



Aciiaiitiim «j^erralilblium. r\ A, v. H. 



Eu-adiantum, Polysoria. — A. diaphano EL affine sed : rachis 

 pilis longis, pallidis vestita; foliola relative longa angustaque, 

 saepe subacuta, acute serrata vel leviter lobata (late crenata)^ 

 lobis acute et irregulariter serratis, supra infraque pilis sparsis 

 pallidissimis plus minusve deciduis munita; sori parvissimi, 

 obreniformes, subrotundati, indusio piloso. 



