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The composition of the leaf oils from seven populations of J. sabina L., one population of Juniperus sabina var. arenaria (E. H. Wilson) Farjon were examined for their geographic variation. In addition, the leaf oils of J. chinensis L. and J. davurica Pall. were compared to J. sabina. Juniperus sabina var. arenaria, the sand loving juniper, oil was found to be very similar to that of J. davurica, Mongolia, and J. sabina, on sand dunes in Mongolia. This suggests that J. sabina var. arenaria might be conspecific with J. davurica. Farjon's move (2001) of J. sabina var. arenaria out of J. chinensis is supported. Considerable differentiation was found in populations of J. sabina from the Iberian peninsula. Cedrol, citronellol, safrole, trans-sabinyl acetate, terpinen-4-ol and β-thujone were found to be polymorphic in several populations. [ABSTRACT FROM AUTHOR]

The essential oil of the rhizomes of Mongolian Rhodiola rosea L. was investigated by GC and GC/MS. Thirty-six constituents were identified in the oil. The main components in the oil were geraniol (32.3%), myrtenol (15.7%), octanol (13.7%), trans-pinocarveol (11.6%), trans-myrtanol (3.2%), isopinocamphone (2.8%) and piperitone (1.2%). Comparisons are made with Rhodiola rosea rhizome oil from Finland and Norway and oils from other Rhodiola species (R. crenulata, Tibet; R. fastigiata, Tibet; R. yunnanesis, China). [ABSTRACT FROM AUTHOR]