Quercus warei

Quercus x warei (Fagaceae) is a hybrid columnar oak, typically a cross involving Q. robur 'Fastigiata' and Q. bicolor. It forms a narrow, upright tree well suited for street and urban plantings where a broad canopy would be impractical.

The most common selection is 'Regal Prince' (also sold as 'Long'), which combines the columnar form of fastigiate English oak with the adaptability and wet-soil tolerance of swamp white oak. It grows in full sun on a range of soils. Hardy in Zones 4 to 8.