S. G. A. Doorenbos (1891-1980), Director of Public Parks in The Hague, finding that seeds he had sown in 1936 from the Zuiderpark 'Pinnato-ramosa' had hybridized with the local 'Belgica', selected six for trials.

The best was cloned and grafted on 'Belgica' rootstock as 'Den Haag'; it was planted first in that city, then released to nurseries elsewhere in the Netherlands.

[1] The tree is distinguished by its pendulous branches, and its foliage, which is light-green on emergence but turning lime-green and ultimately deep green by midsummer.

[4] Although reputed to be slightly resistant to Dutch elm disease, drought, and frost, the tree has brittle branches, and is vulnerable to Coral-spot Fungus Nectria cinnabarina [5] The tree is named for the city of Den Haag (known as The Hague in English).

The UK TROBI Champion grows at Preston Park in Brighton, measuring 14 m high by 77 cm d.b.h.