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Résumé :
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The leaf oils of the species of Philotheca growing in Queensland and northern New South Wales have been examined by combined GC and GC/MS. Philotheca cuticularis, both subspecies of P. difformis, P. glasshousiensis, P. myoporoides subsp. myoporoides, P. epilosa, P. obovata, P. queenslandica and P. sporadica all produced leaf oils in which the major component (<75%) was α-pinene. In P. acrolopha, the major components were α-pinene (34–42%) and β-caryophyllene (12–22%), while in P. ciliata the principal components were α-pinene (48–54%) and camphor (18–25%). In P. ericifolia the major components were α-pinene (16–25%), myrcene (7–10%), (E)-β-ocimene (18–34%) and the sesquiterpene spathulenol (13–21%). Pilotheca conduplicata produced a monoterpenic oil in which the main components were α-pinene (27.2%), limonene (43.8%) and (E)-β-ocimene (18.3%). In Philotheca papillata α-pinene (43.0%), camphene (9.3%) and elemol (8.8%) were the principal components of the leaf oil. The leaf oil of P. salsolifolia subsp. salsolifolia contained α-pinene (31.9%) and spathulenol (18.1%) as its major components, while in P. salsolifolia subsp. pedicellata sabinene (38%) and bicyclogermacrene (15.2%) were the major components.
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