Poncirus trees of Ganghwa-do
The Poncirus tree (Poncirus trifoliata) (í±ìëë¬´), also known as the trifoliate orange, has a couple significant representatives in Gangwha-do, Ganghwa-gun, Incheon. These trees are near the northern limit of their range. Poncirus were planted here (page in Korean) because they form a thorny barrier to invaders, of which Ganghwa-do has had its share.
- Poncirus tree of Gapgot-ri (also  in Korean)
- The tree's address: 1016, Gapgot-ri, Ganghwa-eup Ganghwa-gun Incheon
- Classification: Natural Monument No. 78.
- Age: 400 years
- Height: 4 metres
- Circumference: 1 metre.