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pimpinella_saxifraga_l

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Pimpinella saxifraga L. - syn.Pimpinella nigra Mill.; Pimpinella alpestris Spreng. - Apiaceae
burnet saxifrage, small burnet, lesser burnet, Kleine Bibernelle

Perennial herb, 0.30-0.60m high, native to Europe, West Asia, naturalized in North America; stem round in cross-section; leaves pinnate; flowers pink.

„Pimpinella saxifraga subsp. eusaxifraga: Because of the wide range of morphological varia­bility and the unsatisfactory systematic division it seemed necessary to investigate the essential root oils from plants with simple segmented leaves and dissected leaves separately. Main constituent (about 60%) of the root oils from both forms is trans-epoxy-pseudoisoeugenyl-2-methylbutyrate. Furthermore, it is characteristic for these two oils that 1,4-dimethyl-azulene and its postulated precursors are only present in relatively low concentrations (totally about 5%). In a very few cases we could not at all establish the oc­currence of 1,4-dimethylazulene in the volatile oils of roots from Pimpinella saxifraga subsp.eusaxifraga. Interestingly, the root oils of plants with simple segmented and dissected leaves also exhibit signifi­cant differences, mainly in the sesquiterpenes. The root oil obtained from plants with simple seg­mented leaves contains 7.5% of an unknown ses­quiterpene hydrocarbon C15H22, besides germacrene-B (2.7%) and germacrone. The latter can be recognized by a broad peak in the gas chromatogram, due to cope-rearrangement, representing 17.2% together with its rearrangement product ß-elemenone. In con­trast, these three compounds usually do not occur, or could only be detected in traces, in the root oil from plants with a dissected leaf-form. The major ses­quiterpene in this oil is trans-ß-farnesene (10.9%).
Pimpinella saxifraga subsp. alpestris: This subspecies comprises small plants, growing in mountainous regions and cannot be distinguished re­liably from special forms of the subsp.eusaxifraga by morphological features. The essential root oil of Pimpinella saxifraga subsp.alpestris is dominated by the C12-hydrocarbons pregeijerene and its thermal re­arrangement product geijerene (together amounting to 31.5%). The phenylpropanoid trans-epoxy-pseudoisoeugenyl-2-methylbutyrate shows a lower proportion (23.9%) in comparison with the subsp. eusaxifraga. Besides this, the large amount of ß-bisabolene (17.5%), being distinctively higher than in the other root oils, seems remarkable. As already observed in case of the root oils of the other Pim­pinella subspecies (Table I) monoterpene hydrocar­bons can only be detected in traces.“
[The compositions of the essential root oils from Pimpinella saxifraga sl and chemotaxonomic implications., Kubeczka, K. H., Bohn, I., Schultze, W., Z. Naturforsch., 44c, 1989, 177—182] http://zfn.mpdl.mpg.de/data/Reihe_C/44/ZNC-1989-44c-0177.pdf

upload.wikimedia.org_wikipedia_commons_3_3c_pimpinella_saxifraga_-_k_c3_b6hler_e2_80_93s_medizinal-pflanzen-241.jpg

www.plantgenera.org_illustrations_hd_186042.jpg
Pimpinella saxifraga L. var. dissectifolia; Kohl, F.G., Die officinellen Pflanzen der Pharmacopoea Germanica, t. 77 (1891-1895)

pimpinella_saxifraga_l.1417006507.txt.gz · Zuletzt geändert: 2014/11/26 13:55 von andreas