Table 7. Cold hardiness of evergreen broad-leaf tree(°C)

Species of trees	Cold hardiness			Collection	Distribution
	Leaf	winter bud	Branch
ligustrum japoniam	−13.0	−13.0	−15.0	Kashima (鹿島)	West Tōkai mo
Ilex comuta	−10.0	−8.0	−8.0	Nagoya (名古屋)	West Kansai
Camellia japonica	−13.0	−13.0	−13.0	Irozaki (石廊崎)	South Izu Peninsula
Camellia japonica	−18.0	−18.0	−18.0	Natsu haku peninsula (夏泊半島)	South Natsu haku peninsula

Source : Cold tolerance and cold adaptation of plants : physiology and ecology of winter(Sakai, 1982)