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Nine triterpene saponins (1-9) were isolated from leaves and stems of Silphium radula Nutt. (Asteraceae). Their structures were… Expand SummaryPopulations of Silphium speciosum, Vernonia baldwinii, Solidago canadensis and Pityopsis graminifolia were studied to… Expand Most of the original Black Belt prairie has been lost to agr iculture, deve lopment, the incursion of Eastern Red Cedar… Expand Compass plant (Silphium laciniatum), like other Silphium species, is a new horticultural plant in Poland. It is grown in gardens… Expand