Regal Prince® ('Long') Oak is a cross between Q. robur 'Fastigiata' and Q. bicolor, combining the best features of both its parents. The foliage is a glossy dark green on the upper surface and a glaucous silver on the lower surface which makes it particularly attractive on windy days. Its foliage is highly disease resistant, unlike ordinary Oaks, and it grows in a tight upright oval form. Like the Swamp White Oak, it is very tolerant of a wide range of conditions and has good rusty orange fall color. Earl Cully is its hybridizer.