Today, June 9, 2014, is National Strawberry-Rhubarb Pie Day. A Strawberry rhubarb pie is a type of tart/sweet pie made with a strawberry and rhubarb filling, and sometimes containing tapioca. The pie is usually prepared with a bottom pie crust and a variety of styles of upper crust, depending on preference and region. Rhubarb is a vegetable that originated from Western China, Tibet, Mongolia, and Siberia. Ben Franklin is credited with bringing rhubarb seeds to America. The only edible parts of the rhubarb plant is the stalk. The leaves and roots are poisonous as they contain oxalic acid and another unknown poison. Strawberries are part of the rose family of plants, specifically Fragaria (Rosaceae).