That was the question everyone was asking a few months ago while on the Sacred Heart Holiday Home Tour in Sacramento, CA.
After doing a little research, I found out that these growths are really, really rare.
Some people in Japan use these roots to grow unique bonsai by cutting one off and potting it upside-down. Once planted, the root will soon sprout little gingko leaves at the top.
One site I checked said ‘good luck finding any trees like this outside of China or Japan, as many are protected by law‘.