Flavonol derivatives of the genus Clibadium (compositae) |
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Authors: | Bruce A Bohm Tod FD Stuessy |
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Institution: | 1. Department of Botany, University of British Columbia, Vancouver, BC, V6T 1W5, Canada;2. Department of Botany, The Ohio State University, Columbus, OH 43210, U.S.A. |
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Abstract: | The flavonoids of eleven species of Clibadium are all based on the flavonols kaempferol, quercetin and quercetagetin. Glucose and galactose sugar substitutions occur in all taxa, while rhamnosides, arabinosides, xylosides, rutinosides and diglucosides are less widely distributed. O-Methylated compounds provide the most meaningful taxonomic information and serve to divide the species into two groups. Infraspecific variation of flavonoids is commonplace. This is the first report of flavonoids in Clibadium. |
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Keywords: | Compositae Heliantheae Milleriinae flavonols chemosystematics |
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