Plant · GBIF taxon 3054368
Persian Walnut
Juglans regiaAlso known as English Walnut, Common Walnut, Carpathian Walnut, Madeira Walnut
Persian walnuts are stately deciduous trees prized across thousands of years for their valuable hardwood and nutrient-dense kernel crops. Dense aromatic foliage releases the allelopathic chemical juglone into surrounding soil, suppressing competitive root growth of many neighboring plant species. Mature crowns cast heavy shade across mountain valleys and pastoral foothills, supporting diverse birds and rodents that cache and disperse the heavy seeds.
DeciduousNut-bearingWind-pollinated
1 / 7—observations
—countries
—peak records
Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Diet & prey
- Photosynthetic
Predators
- Eastern Grey Squirrel
- Walnut Husk Fly
- Codling Moth
ThreatsWalnut blight, fungal anthracnose, walnut husk fly infestations, habitat fragmentation
HabitatsTemperate deciduous forests, riparian corridors, mountain valleys, cultivated orchards
Life span100–250 years
Size / weightNot available
Classification
- OrderFagales
- FamilyJuglandaceae
- GenusJuglans
- SpeciesJuglans regia
Range data is not available yet.
Interaction riskHigh
- Low
- Moderate
- High
- Very high
- Why interaction risk is high
- Husks and moldy nuts contain toxins harmful to dogs and horses; never consume wild nuts based on app ID alone.
- Why it is dangerous
- Decomposing husks and fallen nuts readily harbor molds producing tremorgenic mycotoxins that cause muscle tremors and seizures in dogs and livestock.
- How to recognize a risky encounter
- Recognized by smooth rounded green husks turning black as they decay beneath the canopy.
- What to do
- Rake up and discard fallen husks in dog exercise areas, and avoid grazing horses near the root zone.
Responsible observation
- Pet Safety: Keep dogs away from fallen rotting nuts, which foster toxic fungal molds.
- Identification: Look for smooth grey bark and large pinnate leaves with 5 to 9 leaflets.
Same Genus (c) SalamiRaptor, some rights reserved (CC BY-SA), uploaded by SalamiRaptor · cc-by-sa
Same Genus (c) Tom Norton, some rights reserved (CC BY) · cc-by
Image unavailableFrequent Companion 
Same Family (c) Douglas Goldman, some rights reserved (CC BY-SA), uploaded by Douglas Goldman · cc-by-sa
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