THE GENUS TRIGONOSPORA (THELYPTERIDACEAE) IN MALESIA

The distribution of the genus is discussed, and the Malesian species distinguished and described. Two new combinations are effected, Trigono-spora calcarata (Bl.) Holtt. and T. koorderSiiH (Chr.) Holtt.; the latter is here recognized for the first time as closely related to T. calcarata,

THE GENUS TRIGONOSPORA (THELYPTERIDACEAE) IN MALESIA

The distribution of the genus is discussed, and the Malesian species distinguished and described. Two new combinations are effected, Trigono-spora calcarata (Bl.) Holtt. and T. koorderSiiH (Chr.) Holtt.; the latter is here recognized for the first time as closely related to T. calcarata,.<br /

ADDITIONS TO THE FERN FLORA OF JAVA

Cyathea jacobsii (Cyatheaceae), Pneumatopteris auctipinna and Pseu-dophegopteris tenggerensis (Thelypteridaceae) are described as new species. Of these, only the last-named species is confined to Java, as at present known

Chemical compositions of the rhizome oils of two Alpinia species of Malaysia

The essential oils obtained by hydrodistillation of the rhizomes of Alpinia aquatica Rosc. syn. Alpinia melanocarpa and Alpinia malaccensis Roscoe were analysed by capillary gas chromatography and gas chromatography-mass spectrometry. Eighteen compounds, representing 98.4% of the essential oil were identified in A. aquatica rhizome oil, with ß-sesquiphellandrene in 36.5% being the major constituent, while 20 compounds representing 99.7% of the rhizome oil of A. malaccensis were identified, among which methyl (E)-cinnamate (78.2%) was the major constituent