リョウブは、飢饉のときの非常食になる木でした。新芽と花は美味しくないけれど、食べられるそうです。樹皮が薄く剥がれ滑らかな表面になるので、見分けやすいです。
The Clethra barbinervis had been an emergency food in the case of the famine. These are not delicious, but sprouts and flowers are eatable. Because the bark comes off thinly and becomes the smooth surface, it is easy to distinguish it.