Common name: Iron walnut
Scientific name: Juglans sigillata
Chinese name: 泡核桃、铁核桃、深纹核桃、茶核桃
Introduction：
Juglans sigillata is an economically important tree species indigenous to China. It is distributed mainly in southwestern China, especially in Yunnan, Guizhou, and Sichuan province. Within the genus Juglans, J. sigillata exhibits the closest relationship with J. regia. J. sigillata tree can grow up to 25 m tall. It has pinnate leaves of 15-50 cm long and is composed of 9 to 11 (rarely 15) ovate or elliptical leaflets, 6-18 × 3-8 cm in size. The nuts are ovoid-globose or subglobose, 3.4-6 × 3-5 cm in size, which has deep pits and seal-like depressions on the shell surface.
