An exhibit of four plants collected by the Lewis and Clark Expedition and permanently housed in the Lewis and Clark Herbarium at the Academy of Natural Sciences in Philadelphia will find a temporary home in Helena at the Montana Historical Society and Museum.  The plants include three that were collected in Montana: bitterroot (Lewisia rediviva), blanket flower (Gaillardia aristata) and Lewis’s mockorange (Philadelphus lewisia). Beargrass (Xerophyllum tenax) will also be displayed. The exhibit opens on June 3, 2004 with the official opening on June 10 and will run through Labor Day.  Dr. John Taylor will speak about the plants of Lewis and Clark at the opening celebration. Plant related artwork, including paintings by Frederica Marshall, will also be featured.