Origin: East Asia (China)

First finding in Slovenia: 1850

Pathways: ornamental plant; planted in forests, seeds are secondary spread by the wind

Possible to find: year-round

Flowering season: May-June

Habitat: Dry ruderal habitats and a pioneer species in abandoned dry meadows; also in cracks in rocks. Regularly planted as an ornamental tree.

Status in Slovenia: Common in lowland and hilly regions, especially in central and eastern Slovenia. A major problem in urban environments, because it is germinating in small cracks (e.g. in walls and between tiles in the pavement). 

Similar species: European ash, Fraxinus excelsior, American Eastern black walnut, Juglans nigra and American Staghorn sumac, Rhus typhina.

Source: Terenski priročnik za prepoznavanje tujerodnih vrst v gozdovih (Fieldguide for the identification of alien species in forests)

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