Zelkova serrata 'Flekova' (syn. Zelkova serrata 'Green Vase') is a cultivar with a vase-shaped, rising crown with inclining branches. Height 15 m high and 10-12 wide. In the juvenile stage, faster and narrower growth, later it spreads out towards the top. Relatively short strong trunk with soft greyish bark. Leaf shape is species-specific, bright green, bronze-red to orange autumn colours. Healthy and very resistant to Dutch elm disease, therefore used as a replacement tree for the elm in many countries.

Endures air pollution well and is wind resistant. Because of its narrow habitus, a good newcomer in the range of street and avenue trees.