American Larch – Larix laricina

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]

Description

'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]

Pests and diseases

Not known.

Cultivation

The tree is very rare in cultivation beyond the Morton Arboretum.

Accessions

North America

• Morton Arboretum, Illinois, US. Acc. No. 22-2008, one plant.

Europe

• Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 1126.

References