[Wikipedia] Spread Around World: ..native to China. Naturalized in Korea and Japan since at least the 1200s, it was introduced in Europe in 1747, and to America in 1763, and has become a popular landscape tree worldwide. (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 03/29/2025).
