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The leaf essential oils of the genus calocedrus / Robert P. Adams in The journal of essential oil research, Vol. 18 N° 6 (Novembre-Décembre 2006) 

Public ISBD [article]  in The journal of essential oil research > Vol. 18 N° 6 (Novembre-Décembre 2006) . - pp. 654-658 Titre : The leaf essential oils of the genus calocedrus Type de document : texte imprimé Auteurs : Robert P. Adams, Auteur ; Sanko Nguyen, Auteur ; Chang-Fu Hsieh, Auteur Année de publication : 2006 Article en page(s) : pp. 654-658 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Calocedrus  decurrens  Calocedrus  macrolepis  Calocedrus  formosana  Calocedrus  macrolepis  var.  formosana  Platycladus  orientalis  Biota  orientalis  Thuja  orientalis  Cupressaceae  Essential  oil  composition  α-pinene  Myrcene  δ-3-carene  Limonene  Cedrol  Geographic  variation  Systematics Résumé : Farjon (1) considers the genus Calocedrus as containing just three species, C. decurrens (w. N. America), C. macrolepis (S.W. China, N. Vietnam, N. Thailand) and C. formosana (Taiwan). The leaf oils were analyzed and compared to the oil of the closely related species, Platycladus orientalis (E., N.E. China, Korea, far eastern Russia). The oils of C. macrolepis and C. formosana were very similar, being high in α-pinene (57.2% and 67.1%, respectively) and myrcene (11.2% and 6.2%), but they differed in several smaller components. The oils of C. decurrens from two populations in Oregon and one disjunct population in southern California were high in δ-3-carene (15.2–20.2%), limonene (18.2–23.6%), α-pinene (8.7–15.8%), terpinolene (5.7–8.0%), α-fenchyl acetate (3.5–9.7%), with some cedrol (0.8–1.2%). No large differences in oil compositions were seen between the three C. decurrens populations. Platycladus orientalis (= Thuja orientalis, = Biota orientalis) was found to contain considerable amounts of δ-3-carene (29.8%), cedrol (22.2%), α-pinene (15.1%) and terpinolene (4.9%). Overall, the oil of C. decurrens is as different from C. macrolepis and C. formosana as it is from P. orientalis, suggesting considerable divergence between Caloce-drus species, but not between C. macrolepis and C. formosana. These leaf oil analyses support the recognition of C. macrolepis var. formosana in Taiwan as treated in the Flora of China. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699196#.UXKfMkqC5mM [article] The leaf essential oils of the genus calocedrus [texte imprimé] / Robert P. Adams, Auteur ; Sanko Nguyen, Auteur ; Chang-Fu Hsieh, Auteur . - 2006 . - pp. 654-658. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 18 N° 6 (Novembre-Décembre 2006) . - pp. 654-658 Mots-clés : Calocedrus  decurrens  Calocedrus  macrolepis  Calocedrus  formosana  Calocedrus  macrolepis  var.  formosana  Platycladus  orientalis  Biota  orientalis  Thuja  orientalis  Cupressaceae  Essential  oil  composition  α-pinene  Myrcene  δ-3-carene  Limonene  Cedrol  Geographic  variation  Systematics Résumé : Farjon (1) considers the genus Calocedrus as containing just three species, C. decurrens (w. N. America), C. macrolepis (S.W. China, N. Vietnam, N. Thailand) and C. formosana (Taiwan). The leaf oils were analyzed and compared to the oil of the closely related species, Platycladus orientalis (E., N.E. China, Korea, far eastern Russia). The oils of C. macrolepis and C. formosana were very similar, being high in α-pinene (57.2% and 67.1%, respectively) and myrcene (11.2% and 6.2%), but they differed in several smaller components. The oils of C. decurrens from two populations in Oregon and one disjunct population in southern California were high in δ-3-carene (15.2–20.2%), limonene (18.2–23.6%), α-pinene (8.7–15.8%), terpinolene (5.7–8.0%), α-fenchyl acetate (3.5–9.7%), with some cedrol (0.8–1.2%). No large differences in oil compositions were seen between the three C. decurrens populations. Platycladus orientalis (= Thuja orientalis, = Biota orientalis) was found to contain considerable amounts of δ-3-carene (29.8%), cedrol (22.2%), α-pinene (15.1%) and terpinolene (4.9%). Overall, the oil of C. decurrens is as different from C. macrolepis and C. formosana as it is from P. orientalis, suggesting considerable divergence between Caloce-drus species, but not between C. macrolepis and C. formosana. These leaf oil analyses support the recognition of C. macrolepis var. formosana in Taiwan as treated in the Flora of China. ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2006.9699196#.UXKfMkqC5mM