イチイ科カヤ属の常緑高木で、学名は Torreya nucifera。英名は Japanese torreya。
The Japanese torreya (Torreya nucifera) belongs to Taxaceae (the Yew family). It is a tall evergreen tree that is native from Miyagi prefecture of Honshu south to Shikoku and Kyushu. This tree grows in mountains and it can reach about 25 m in height. The bark is gray-brown and slightly furrowed longitudially. The leaves are linear about 2 cm long, and arranged spirally or in double rows. They have two, narrow, white stomatal bands on the rear surfaces. The male flowers are borne at the new-branch axils and the female flowers are borne at the new-branch bases in May. The seeds are covered with green arils, ripen and fall without change in next September.