Abstract Oils produced from the fruits, stems and leaves and roots of Lomatium rigidum were subjected to analysis by GC, GC/MS and other spectroscopic techniques. The oils of fruits as well as the stems and leaves of L. rigidum were found to contain β-phellandrene/limonene (9.1â25.7%), δ-cadinene (7.5â12.9%), α-cadinol (16.4â18.6%), epi-α-cadinol and epi-α-muurolol (8.2â9.0%) as major components. The root oils were found to be rich in (Z)-falcarinol (10.8â14.9%), 2-epi-β-funebrene (48.2%), a new funebrene epimer, as well as the new (Z,Z,Z)-3,6,9-tridecatriene.