| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Oleaceae | Syringa reticulata | Japanese Tree Lilac, Chinese Tree Lilac, Korean Tree Lilac | Grown horticulturally, escaping. | Native of e. Asia. |  |
| Oleaceae | Syringa vulgaris | Lilac | Commonly planted, persistent and naturalizing around old farms. | Native of se. Europe. |  |
| Oleaceae | Syringa xpersica | Persian Lilac | Cultivated, sometimes persistent. | Horticultural hybrid of two Eurasian species. |
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