The leaf of the Gingko tree, used in traditional Chinese medicine, has remarkable rejuvenating properties. The Gingko leaf was chosen for the symmetry and new life that it represents.
The Ginkgo has the intriguing distinction of being one of the world's most urban-tolerant trees, often growing where other trees cannot survive. Ginkgos rarely suffer disease problems, even in urban conditions, and are attacked by few insects.
Ginkgos are also popular subjects for growing as penjing and bonsai; they can be kept artificially small and tended over centuries. Furthermore, the trees are easy to propagate from seed.
Extreme examples of the Ginkgo's tenacity may be seen in Hiroshima, Japan, where four trees growing between 1–2 km from the 1945 atom bomb explosion were among the few living things in the area to survive the blast. While almost all other plants (and animals) in the area were destroyed, the ginkgos, though charred, survived and were healthy. The trees are alive to this day.