The Latin name for the wingnut derives from the Greek words pteron = wing and carya = nut. It belongs to the walnut family. Native to the Caucasus and northern Iran, the wingnut grows mainly on river alluvial deposits and can withstand prolonged flooding without damage. For around 150 years, the tree has been planted in parks and large gardens, sometimes also as an avenue tree. With age, the broad crown gives the tree a decorative habit. The yellow leaf color and distinctive fruits are particularly decorative in autumn. These can be used for crafts. The wood of the tree provides one of the most valuable veneers for furniture production. The fine, distinctive dark grain is highly prized.

• Origin: humid forests from the Caucasus to northern Persia

• Height: 15–20 m
  
  
• Leaves: alternate, pinnate, up to 50 cm long, 13 to 21 leaflets, oblong, 8 to 12 cm long, dark green, very early budding, yellow autumn color
  
  
• Flower: green in hanging catkins, male inflorescences up to 20 cm long; May
  
  
• Fruit: semicircular, winged nutlets, strung together like a string on a thin spindle up to 40 cm long
  
  
• Soil/location: very adaptable, prefers moist to wet, deep, nutritious soils; sunny to partially sunny
  
  
Special feature: on moist soils, the wingnut forms strong runners extending beyond the crown edge.