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Foliage was collected from flowering individuals of large thyme (Thymus pulegioides L.) at seven localities in southern Denmark. The leaf material was soaked in 96% ethanol and subsequently analyzed for terpenes using GC and GC/MS. Five chemotypes were detected: carvacrol, linalool, geraniol and thymol, all of which are known to appear in large thyme. In addition, individuals containing the monoterpene cis-sabinene hydrate as the dominant component of their essential oil were found. A sabinene hydrate chemotype has not previously been detected in large thyme, although it does occur in other thyme species.
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Groendahl et al. (2008) studied this question.
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