庆祝美国250岁生日：新州花展亮相

America is turning the big 250 this year. To celebrate, the United States Botanic Garden in Washington, D.C., has a new exhibit of state flowers. Through October 12, visitors can go on a scavenger hunt in the glass-domed conservatory and outdoor gardens to find blooms representing all 50 states, the District of Columbia and U.S. territories. Whether you’re a flower enthusiast or just a casual fan, the exhibit has something for everyone. Science News had the opportunity to take a tour on opening day. Experts showed us over a dozen burgeoning blossoms and gave us their backstories. Consider Oregon’s state flower, the Oregon grape (Berberis aquifolium). Not a true grape, it has roots and stems with medicinal properties. …