A columnar tree that gets a narrow oval crown when older. The tree grows to 12 to 18 m tall and 6 m wide. The branches grow straight up creating a dense crown. The young twigs are grey-brown. The old bark is green-grey and its grooves form small rectangular blocks. The leaves are obovate and distinctly larger than those on Q. robur. They are glossy dark green, turning yellowish brown in autumn. The acorns are over 2.5 cm in size. They are around half-enclosed by the cupule which is covered with triangular scales. The tree originated from a cross between Q. robur ‘Fastigiata’ and Q. bicolor. It has inherited the good characteristics of each parent species: closed columnar habit, high resistance to mildew and very wind resistant. A few years later, Q. x warei Kindred Spirit (‘Nadler’) was also selected from the same seeds.
Quercus ×warei REGAL PRINCE ('Long') môže dorastať do výšky 12 - 18 m v závislosti od podmienok stanovišťa a klímy.
Quercus ×warei REGAL PRINCE ('Long') rastie priemerne rastúci a môže dorastať do výšky 12 - 18 m v závislosti od podmienok stanovišťa a klímy.
Listy stromu Quercus ×warei REGAL PRINCE ('Long') sa na jeseň sfarbia do žltá."
Správny čas na výsadbu stromu je mimo vegetačné obdobie. V strednej Európe môže byť Quercus ×warei REGAL PRINCE ('Long') so zemným balom vysadený od polovice novembra do konca apríla, avšak závisí to veľmi od klimatických podmienok a druhu stromu.
Quercus ×warei REGAL PRINCE ('Long') kvitne v máj.