 The leaves are typical of "U. pumila" × "Ulmus × hollandica", being very unequal at the base.The seed is central in the samara (see 'External links').Although reputed to be moderately resistant to Dutch elm disease, drought, and frost, the tree has brittle branches, and is vulnerable to Coral-spot Fungus "Nectria cinnabarina" 

The tree is named for the city of Den Haag (known as The Hague in English).