The essential oil of Artemisia ‘Powis Castle’ is characterized by its richness in β-thujone (41.2±2.9%) and (z)-epoxy-ocimene (24.8±2.3%). The essential oil of ‘Powis Castle’ does not contradict a putative origin from A. absinthium x A. arborescens pending elucidation of the inheritance of essential components in the genus Artemisia.
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Tucker et al. (1993) studied this question.
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