Volatile leaf oils of some south-western and southern Australian species of the genus Eucalyptus (series I). Part XVIII. A. Subgenus monocalyptus. B. Subgenus symphyomyrtus: (i) section guilfoyleanae; (ii) section bisectaria, series accedentes, series occidentales, series levispermae, series loxophlebae, series macrocarpae, series orbifoliae, series calycogonae; (iii) section dumaria, series incrassatae and series ovulares

The volatile leaf oils of Eucalyptus megacarpa F. Muell., E. calcicola Brooker, E. preissiana Schauer subsp. lobata Brooker & Slee, E. guilfoylei Maiden, E. accedens W. Fitzg., E. trivalvis Blakely, E. zopherophloia Brooker & Hopper, E. pruiniramis L. A. S. Johnson & K. D. Hill, E. redacta Brooker & Hopper ined., E. subangusta (Blakely) subsp. subangusta, E. subangusta (Blakely) Brooker & Hopper subsp. pusilla Brooker & Hopper, E. subangusta (Blakely) Brooker & Hopper subsp. cerina Brooker & Hopper, E. phaenophylla Brooker & Hopper subsp. interjacens Brooker & Hopper, E. loxophleba Benth. subsp. loxophleba, E. loxophleba Benth. subsp. lissophloia L. A. S. Johnson & K. D. Hill, E. loxophleba Benth. subsp. gratiae Brooker, E. semota C. J. Macph. & P. M. Grayling, E. glomerosa Brooker & Hopper, E. kingsmillii (Maiden) Maiden & Blakely subsp. alatissima Brooker & Hopper, E. leptopoda Benth. subsp. elevata K. D. Hill & L. A. S. Johnson, E. crucis Maiden subsp. lanceolata Brooker & Hopper, E. brevipes Brooker, E. captiosa Brooker & Hopper, E. brachycorys Blakely, isolated by vacuum distillation, were analysed by GC and by GC–MS. Many species contained α‐pinene (0–27.4%), limonene (0–12.0%), α‐phellandrene (0–16.1%), 1,8‐cineole (1.9–78.2%), p‐cymene (0.1–15.0%), β‐caryophyllene (0–10.5%), aromadendrene (0–31.5%), bicyclogermacrene (0–42.3%) and torquatone (trace–6.7%) as principal leaf oil components. © 1997 John Wiley & Sons, Ltd.