Clarke brendham - clarke brendham - Brendan Coyle - Wikipedia

Diverse schemes have been proposed for the classification of the Commelinaceae on the basis of different characters. The leaf flavonoids of 152 species have been analysed. The flavone C- glycosides are the dominant compounds, found in 78% of the species examined. Flavonol O- glycosides are present in 28% of the species, quercetin being the most frequent aglycone. 6-Hydroxyluteolin was found mainly in Tradescantia but also in other species (10%). Tricin has been detected sporadically in less than 5% of the species. In spite of these variations the pattern of the family is very uniform, because the presence of C- glycoflavones and the distribution of the other compounds supports the scheme proposed by Rohweder who divided the family into Commelinieae and Tradescantieae on the basis of inflorescence characters.

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