| Scientific Name: | Quercus phellos |
| Common Name: | willow oak |
| Family Name: | Fagaceae |
| Origin: | U.S. - central, U.S. - southwest |
| Hardiness Zone: | Zone 6: (-23 to -18 °C) |
| Plant Type: | Tree - deciduous |
| Mature Size: | 15 - 22m x 7 - 10m (height x width) |
| Habit: | Dense, Pendulous, Spreading, Twiggy, Upright |
| Form: | Oval - vertical, Pyramidal - widely |
| Texture: | Medium - fine |
| Landscape Uses: | Screening, Shade tree, Specimen plant, Tall background, Wetland - bogs, Wind break |
| Exposure: | Full sun, Part sun/part shade |
| Soil or Media: | Well-drained |
| Leaves: | Simple, Alternate, Soft flexible, Pinnate venation, Glabrous, Lustrous, Elliptic, Lanceolate, Oblong, Entire, Undulate (wavy) |
| Flowers: | Catkin (ament), Green-yellow, Mar |
| Fruit: | Nut, Yellow, Brown, May |
| Key ID Features: | |
| Twiggy, horizontal oak tree; leaves alternate (may appear whorled at stem tips), lanceolate to narrowly elliptic-oblong, most blades 8-12cm long x 1.5-2.5cm wide; margin entire to wavy; petioles 2-5mm long. Winter ID: persistent or fallen leaves; twigs narrow, glabrous; terminal buds ovoid, pointed, appear clustered, reddish-brown, about 2mm long; leaf scars raised, half-round with scattered bundle scars. | |