The Andrew Jackson Magnolia tree story
originally published here: http://www.oakridger.com/article/20100216/NEWS/302169988 A magnolia tree, Andrew Jackson and the $20 bill, By D. Ray Smith, Feb 16, 2010
— some more recent information here: http://www.history.com/news/the-white-house-is-taking-down-the-188-year-old-jackson-magnolia
The White House is Taking Down the Iconic Jackson Magnolia, by Becky Little, December 27, 2017.
— and a bit more here: https://www.cbsnews.com/news/jackson-magnolia-on-white-house-south-lawn-coming-down/ Part of Jackson Magnolia on South Lawn coming down, White House says by Emily Tillett, CBS News, December 26, 2017.
Note: Smith gives the deepest historical discussion, avoiding generic historical cliches.
Note2: It is overblown to write the magnolia was “featured” on the twenty dollar bill. An image of the White House south front is on the bill, surrounded by masses of vegetation, including the magnolia.