Plantcompass
Tree of heaven (Ailanthus altissima)
General Information
Family: Quassia family (Simaroubaceae)
Flowering period in Central Europe: Late summer
Months: 7–8
Allergy potential
Potentially a new allergen in Europe, skin reactions have already been documented.
Cross-reactions
Allergens show high similarity to corn, mugwort, alternaria and some grass species.
Botanical Information
Distribution
Natural distribution in China and Vietnam. Introduced and planted as a park or ornamental tree in many countries in Europe, America, Africa, and Australia. In countries with temperate or Mediterranean climates, invasive neophyte. Habitats - Pioneer plant on nutrient-poor, dry sites (e.g., railway embankments, wastelands, abandoned sand or gravel pits).
Morphology
Habit - Medium-sized tree, bark of older trees shows a diamond-shaped pattern. Foliage - Deciduous, no autumn coloration, late leaf fall. Foliage - Pinnate leaflets, leaflets oval to elongated, glands at the leaf base secrete sugar to attract ants. Reproduction - Yellowish flowers, strong odor, spiral twisted fruits with central seed.