Sophora japonica

Also known as the Japanese Scholar Tree or Japanese Pagoda Tree.  Sophora japonica is a source of a number of bioactive compounds, including the phytoestrogens genistein and genistin, as well as the flavonoids rutin, kaempferol and quercetin.  Kaempferol has shown anti-obesity activity in animal and in-vitro experiments, but human data is lacking.