关键词: 水紫树, 品种

Abstract: Seeds of Nyssa aquatica are introducted from Virginia，the United States，and a new cultivar‘Yutianzi’was bred from the seedlings. This cultivar has late germination with light green florets from the end of March to the beginning of April，and long-ovate，simple，alternate leaves. The mature leaf have a length of 10–15 cm，and a width of 5–7 cm. The leaves turn to golden yellow in autumn. The fruits are long oval and purplish red after maturity. It is resistant to waterlogging，and it is suitable for afforestation in low-lying areas such as farmland water network or shoal.

Key words: Nyssa aquatica, cultivar