Other products include guarana, soapberries, and maple syrup. The wild rose blooming announced the readiness of sxusem (soapberries) for Nlaka'pamux. Saponins are the chemical compound which give soapberries their bitter taste and distinctive foaming abilities. Soapberries are part of the Elaeagnaceae Family. When soapberries are ripe for harvest, they will possess a variety of defining features. Soapberries hold a high place and have a lasting taste memory. Soapberries are harvested in dry areas during the summer months of July, August, and September.