Helena
ActiveUlmus laevis Pall. European white elm · Ornamentals · bred by Bart van de Sluis
also searched as: хелена
Variety description
10 August 2026
The tree reaches 20–22, sometimes 25 meters in height, the width of the mature crown is about 12 meters. It is characterized by the presence of a pronounced vertical central leader and uniform development, which distinguishes it from wild forms of the species.
The leaves are large, asymmetric and serrated, and have a matte green hue in summer. The variety tolerates temporary flooding, moist soils and the influence of sea wind well. It possesses partial resistance to Dutch elm disease and low susceptibility to aphids.
The purpose of the variety is decorative landscaping of alleys, parks, large gardens and areas of historical development.
Sources3
- Loading…
Countries of admission
1 jurisdiction
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
Variety registered as early as 1 jurisdiction, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.
Variety in registries Regions of admission, rights holders, and status of plant breeders' rights
Parties
- Breeder
- Bart van de Sluis 4 Developed the variety
- Applicant
- Bart van de Sluis 4 Submitted the application to the register
- Rights holder
- Bart van de Sluis 4 Holds the rights to the variety
Plant breeders' rights
The right is granted for a limited term: propagation of the variety requires a license from the rights holder.
- Application filed 19 September 2014
- Registered 2 July 2018
- Currently active indefinite in the register
More 1 record protections in other jurisdictions are shown on the map above.
Records are sourced from official registry publications. Data sources and legal status
Found an error in the record?
The directory replicates the primary source. If an entry differs from the official publication, please specify the discrepancy and provide a link if possible. Corrections are added to the moderation queue.
This is a directory, not an official registry: data is based on public disclosures and may have changed. More about sources