1987 年 107 巻 3 号 p. 219-226
The essential oils of six species of wild-ginger collected in Ryukyu Islands and Taiwan were investigated. Heterotropa yakusimensis contains mainly trans-asarone as the constituent of its essential oil. H. gusk possesses many of minor constituents together with a major component, β-pinene. H. hatsushimae also contains a number of minor sesquiterpenoids along with a large quantity of trans-asarone. H. dissita includes trans-asarone, elemicin and euasarone as major components. H. gelasia contains safrole and elemicin as major components along with many of minor sesquiterpenoids. Geotaenium epigynum collected in Taiwan contains many sesquiterpenoids as minor constituents together with a small amount of elemicin.