Abstract
Catechin, quercitrin, robinin, quercetin 3-methyl ether, scopoletin, cholorogenic acid, several leucoanthocyanins, and condensed and hydrolyzable tannins were identified in bark and leaves ofQuercus velutina Lamarck. The concentrations of most phenolics in leaves increased as the growing season progressed, whereas those of most phenolics in bark remained essentially unchanged. Qualitative differences in bark and leaf phenolics among different trees were negligible.
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Parker, J. Phenolics in black oak bark and leaves. J Chem Ecol 3, 489–496 (1977). https://doi.org/10.1007/BF00989069
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DOI: https://doi.org/10.1007/BF00989069