abstract a concrete from acacia caven (mol.) mol. flowers collected in the central region of argentina, at the end of the spring, was isolated by extraction with light petroleum ether yielding 1.09%. volatile compounds of the concrete were isolated by steam distillation yielding 0.06% (m l of oil/100 g of extracted flowers). flower oil was analyzed by gc and gc/ms. the main constituents were: geranyl acetone (2.2 %), -eudesmol (4.0 %), (e,e)-farnesol (3.1 %), (e,e)-farnesyl acetate (6.2 %), nonadecane (15.4 %), kaurene (6.6%), heneicosane (13.5%), tricosane (7.7%) and pentacosane (6.6%). the variation in group content was: monoterpenes (0.9%), diterpenes (7.5%), linear saturated hydrocarbons (49.9%), linear unsaturated hydrocarbons (1.4%), oxygenated sesquiterpenes (9.0%), and other oxygenated compounds (17.0%). key word index: acacia caven mimosaceaeessential oil compositionnonadecaneheneicosane