106 The Philippine Journal of Science me 



DRYOPTERIS FEROX (Bl.) O. Ktze. Rev. Gen. PI. 2 (1891) 812; v. A. 

 v. R. Mai. Ferns 221. 

 Aspidium ferox Bl. Enum. PI. Jav. (1828) 153. 

 Amboina, near the town of Amboina, Robinson PL Rumph. Amb. US9, 

 July 23, 1913, river banks, altitude about 10 meters, "pinnae 25 to 40 on 

 each side of the rachis." 



Representing: Filix amboinica mas (sive agrestis) Rumph. Herb. 

 Amboin. VI, 69. 

 Distrib. : Malaya. 



DRYOPTERIS INTERMEDIA (Bl.) O. Ktze. Rev. Gen. PI. 2 (1891) 

 813; v. A. v. R. Mai. Ferns 199; 



Dryopteries rhodolepis C. Chr. Ind. Fil. (1906) 288 p. p. 

 Aspidium intermedium Bl. Enum. PI. Jav. (1828) 161. 

 Amboina, Hitoe messen, Rel. Robins. 1956, altitude about 450 meters. 

 Somewhat larger than usual, and the lowest pinnae broader, much produced 

 on the lower side. 

 Distrib.: Malaya. 



DRYOPTERIS PSEUDO-ARBUSCULA v. A. v. R. sp. nov. 



Nephrodium. — Rhizoma breviter trunciforme, apice squamis 

 longis, subulatis, integerrimis, pallide fuscis vestitum. Stipites 

 conferti, infra pinnas reductas 2.5 ad 3.5 cm longi, breviter his- 

 pidi. Frondes lanceolatae, 20 ad 25 cm longae, ad mediam 5 ad 

 6 cm latae, acuminatae, rachide pilis longis, acutis, pallidis dense 

 hispida. Pinnae herbaceae, utrinque breviter puberulae, ad 

 costas venasque subtus hispidae; pinna terminalis triangularis, 

 apice subcaudata et subintegerrima, basi profunde pinnatifida; 

 pinnae laterales remotae, ca. 18 utrinque, horizontales vel paten- 

 tes, lineares, obtusae, costulis (main veins) obliquis, superiori- 

 bus simplicibus, ceteris pinnatis, venis 1-3 utrinque, venis infimis 

 anastomosantibus ; pinnae superiores adnatae, ceterae subpetio- 

 Iulatae ; pinnae maximae 3 cm longae, basi truncata vel subtrun- 

 cata el paullo dilatata (sub-l-2-auriculata) usque ad 7 mm latae, 

 margine costam versus usque ad i lobatae ; pinnae ceterae minus 

 incisae vel subintegerrimae ; pinnae inf eriores sensim vel abrupte 

 reductae, infimae minute auriculiformes. Lobi obtusi, integer- 

 rimi vel parce repando-crenati. Sori ad venas mediales, majus- 

 culi; indusium persistens, copiose hispido-ciliatum. 



Amboina, Batoe merah, Rel Robins. 1962, August 24, 1913, terrestial 

 in bed of a ravine, altitude about 20 meters; the rhizome horizontal, often 

 exposed from 10 to 20 cm. 



Differs from Dryopteris arbuscula O. Ktze. in having the pinnae blunter, 

 hispid on the veins beneath, the veins less numerous, less copiously anasto- 

 mosing, and the indusia ciliate. 



