Woody > Pterocarya > Pterocarya fraxinifolia > Pterocarya fraxinifolia
Pterocarya fraxinifolia
Caucasian Wingnut
Origin: Native to Japan, it was introduced to France in 1784, and to Great Britain after 1800.
| Family |
| Juglandaceae |
| Genus |
| Pterocarya |
| Species |
| fraxinifolia |
| Category |
| Woody |
| Type |
| Tree (deciduous) |
| Pronunciation |
| USDA Hardiness Zone |
| 5 - 8 |
| Canadian Hardiness Zone |
| 3a - 7a |
| RHS Hardiness Zone |
| H5 - H7 |
| Temperature (°C) |
| -15 - (-20) |
| Temperature (°F) |
| 5 - (-4) |
| Height |
| 9 - 15 m |
| Spread |
| 9 - 15 m |
Photographs
Cultivars
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Description and Growing Information
Flowering Period
| Landscape |
| Large parks, commercial plantings and residential lawns. |
| Cultivation |
| Full sun and partial-shade. Average, medium moisture and well-drained soil. Tolerates hard, compact soils. Drought tolerant. |
| Shape |
| Upright, rounded and broad. |
| Habitat |
| Flat ground and shallow slopes near river banks. |
| Bark/Stem Description |
| The bark is a dull grey, with a network of broad vertical ridges. |
| Leaf Description |
| Compound,, odd-pinnate leaves that are 45 cm long. Each leaf contains 7 - 27, ovate to oblong-lanceolate, sharply-toothed leaflets that are 5 - 12 cm long. |
| Flower Description |
| Non-showy, monoecious flowers appear in pendulous catkins in late spring. Female catkins are 50 cm long and male catkins are 12 cm long. |
| Fruit Description |
| Small winged nutlets develop in female catkins in early summer, forming pendulous strings that are 50 cm long. |
| Colour Description |
| Nutlets are green and become brown as they mature. The leaves are dark green. the flowers are light green. |
| Texture Description |
| The leaves have a glossy texture. |
| Notable Specimens |
| Westonbirt, The National Arboretum, Tetbury, Gloucestershire, England. |
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