PsilopeganumPsilopeganum is a genus of flowering plants of the family Rutaceae.CharacteristicsIt is a monotypic genus, with only a single species: Psilopeganum sinense.DistributionIt is native to the Three Gorges Reservoir area, in the Hubei province of central China, where it has become endangered. A specimen exists at the New York Botanical Garden.Medicinal usesPsilopeganum sinense is one of the 50 fundamental herbs used in traditional Chinese medicine.