Fringe tree ('Chionanthus virginicus' L.) stem bark offers a sustainable alternative to root bark

Traditional preparations from the root bark of fringe tree ('Chionanthus virginicus' L.) have been used as a cholagogue and hepatic stimulant. Unfortunately harvesting of the root bark can result in significant damage and generally the tree is destroyed. This investigation has shown that the same phytochemically important compounds, lignans and secoiridoids, are present in the root and stem barks. While variations in the ratios of these constituents are evident, the stem bark offers a good substitute for the root bark. This new information should enable a more sustainable harvesting program for this natural resource, allowing for several years' harvesting of the biomass before natural death calls for replanting.