Syringa (Philadelphus lewisii) was designated the official state flower of Idaho in 1931. The species name (lewisii) honors Meriwether Lewis (of the Lewis & Clark expedition), who wrote about the plant in his journal.
Syringa is a woody shrub with clusters of white, fragrant flowers (similar to mock orange) that grows up to 10 feet tall. Native Americans found many uses for the syringa - the wood was used to make pipe stems, harpoon shafts, bows, arrows, root digging sticks, and snowshoes. The bark and leaves were used to make a soap.