Plantcompass

General Information

Family: Walnut family (Juglandaceae)
Flowering period in Central Europe: Early to Full Spring
Months: 4–5

Allergy potential
Low allergenicity. Main allergen Jug r 5.

Cross-reactions
Nuts can trigger food allergies (contain allergens Jug r1–7).

Botanical Information

Distribution
Native to North America, Central America, along the Andes in South America, the Mediterranean region to the Caspian Sea, from Iran along the Himalayas to Southeast Asia. Plains to lower mountainous areas. Cultivated as a crop (nuts) in many Northern and Southern Hemisphere countries.

Morphology
Habit — Tree. Foliage — Summer-green, ovate pinnate leaves, leaf margin serrate or entire. Reproduction — Monoecious, ♂ catkins hanging, ♀ catkins spike, nuts.

Common species in Europe

Common Walnut (Juglans regia).
Habit — Tree. Distribution — Cultivated in gardens, also escaped in forests.