Tinkturenpresse

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Colchicum autumnale L. - Liliaceae - autumn crocus, meadow saffron, naked boys, Herbstzeilose

Perennial herb, up to 40cm tall (leaves), native to Europe; leaves broad lanceolate, appearing in spring with fruits (capsules); flower a narrow erect tube, pinkish to pale purple, appearing in autumn (crocus-like, but with 6 - not 3 - stamens and 3 simple stigmas).

The extraction of seeds of C.autumnale by supercritical carbon dioxide gave the alkaloids (mean total content 1.8%) colchicine (1.25%), 3-demethylcolchicine (0.17%) and colchicoside (0.45%). Sovent extraction (methanol/water 95:5) gave total alkaloids 1.8%, colchicine (1.20%), 3-demethylcolchicine (0.12%) and colchicoside (0.54%).
[Supercritical carbon dioxide extraction of colchicine and related alkaloids from seeds of Colchicum autumnale L., Ellington, E., Bastida, J., Viladomat, F., Codina, C., Phytochemical Analysis, 14(3), 2003, 164-169]