Abstract
Essentially complete analyses are reported of the sesquiterpene fractions from the
leaf oils of Pinus longifolia, P. pinaster, P. thunbergii, P. densiflora, Chamaecyparis
nootkatensis and C. obtusa and of oil from the liverwort S cap a ni a undulata. These
species have been recorded as sources of longifolene and related compounds but the
present results differ considerably from those of the previous (often incomplete)
analyses. The best sources of longifolene and its relatives were P. pinaster and S.
undulata (16; 46 % of the steam volatile oil respectively) and enantiomorphic compounds
were found in the two species.
