Ring-cupped oak or Japanese blue oak trees (Quercus glauca) are native to Asia and can be found across Japan. They produce acorns from October to November and the acorns are not only fed on by insects and birds but were eaten by people as a famine food in Japan. Oak trees are usually known for the acorns but ring-cupped oak trees produce beautiful cylindrical flowers and red shoots, which look like the heads of Pteranodon to me (scroll down), from April to May.
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| 2026/4/15 |
