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Japanese Torreya
Torreya nucifera
カヤ
An evergreen conifer of the Taxaceae family with sharply pointed leaves. Its seeds yield oil and are also roasted for eating, and its wood is the finest material for go and shogi boards.
Identification Points
- ✓葉は線形で先が硬く鋭い
- ✓葉裏に2本の淡褐色気孔帯
- ✓種子は楕円形で油を含む
Habitat
本州・四国・九州の山地・社寺
Season
4〜5月（花）／翌年9〜10月（種子）
3D Specimen Model
Kyushu University, Shikano Lab (CC0)
View on Sketchfab→Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Parallel
Leaf margin
Entire
Evergreen/Deciduous
Evergreen
Leaf shape
Needle
Petal fusion
No petals
Stipules
Absent
Ovary position
Superior
Plant sex
Dioecious
Phylogenetic Positionイチイ科 →
Phylogenetic Position
Gymnosperms > Conifers > Pinales > Taxaceae
Divergence Era
Mesozoic Jurassic (approx. 180 million years ago onward)
Sources & References
🤖Claude AI
AI-generated, needs verification