Chinese milk vetch

This is flower called "chinese milk vetch". In Japanese, this is known as "Rengesou". It's scientific name is "Astragalus sinicus". This flower bloom on April and May. Also this is leguminous and live close together with nitrogen fixation bacteria. So Many people have been growing Chinese milk vetch in rice paddy for many years. But recetly, I cannot see this flower in our surronding much(-_-;) I remember playing with this flower to make a floral decoration and wreath.