| Ulmus davidiana var. japonica 'Validation' | |
| Variety: | Ulmus davidiana var. japonica |
| Cultivar: | 'Validation' |
| Origin: | Morton Arboretum, Illinois, US |
The Japanese Elm cultivar Ulmus davidiana var. japonica 'Validation' is a selection made by Kunso Kim and Bethany Brown of the Morton Arboretum released in 2011; propagation is by grafting onto Siberian Elm Ulmus pumila rootstocks. [1]
'Validation' is a vase-shaped tree, the trunk bark smooth and gray. The current year's twigs are light green, contrasting with the previous year's, which are greenish brown.[1]
Not known.
The tree is very rare in cultivation beyond the Morton Arboretum.