Here are the answers to the quiz. 1. There's a bald cypress (Taxodium distichum) in Fern Valley. The "knees," which push up out of the wet soil surrounding the tree, are really extensions of the roots and allow air to get to the roots. 2. Ilex opaca, or American Holly, is found in the holly collection. Some of these trees bear red berries while others bear bright yellow berries. While the leaves of some holly trees produce a tea containing caffeine, the leaves of ilex opaca produce a caffeine-free tea. 3. Gingko bilboa, a small but real gingko tree, is in the National Bonsai Collection. It's 120 years old and has been under cultivation for 50 years. 4. Hovenia dulcis, a deciduous Japanese raisin tree, is among the more than 1,500 dwarf conifers found in the Gotelli Collection. 5. Metasequoia glyptostroboides, or dawn redwoods, are found in a grove between the Gotelli Collection and the Dogwood Collection. The trees are almost extinct and, prior to 1945, were known to western botanists only through fossil records. The trees were brought to the Arboretum from China in 1948. 6. Bee balm, or Monarda didyma, was used as hair oil by New York Indians. After the Boston Tea Party, the colonists used it to make tea. It's in the American Indian Specialty Garden at the National Herb Garden. 7. The Franklin Tree in Fern Valley was discovered in Georgia in 1765 by John Bartram. It has not been found in the wild since 1790, and this and all other Franklin trees probably come from stock collected by Bartram. 8. Edmund McIlhenny brought the seeds of Capiscum frutescens, a hot pepper, back from the Mexican War and grew them on Avery Island, Louisiana, thus starting the Tabasco Sauce industry. Every spring the McIlhenny Company sends crates of the plants to the Arboretum. 9. Buxus sempervirens, "Braham Blandy," is in the Arboretum's Boxwood Collection.