Cultivar Names are established by publishing in hard copy. BGI will accept your cultivar name submissions and publish them on a quarterly basis in our newsletter, The Herald. This publication will be mailed to the ICRA for brugmansia and datura, as well as botanical libraries. The form for submitting your cultivar names for publication in The Herald is located here.

According to the International Code of Nomenclature for Cultivated Plants

The name will have to be published in order to be fixed. You may either publish it yourself, say in your nursery catalogue if you are a nurseryman, or the ICRA concerned will publish it for you in due course if you register the name with them. ICRAs however are placed under no obligation to publish your name within a short period of time and you should realise that your chosen name might be used by someone else for a completely different plant unless you take steps to ensure early publication. If someone else, even if in a different part of the world, publishes your chosen name for a different cultivar in the same genus or other denomination class, you will have to think of another. Publication of your new name must be in printed or similarly duplicated matter which is distributed to the general public or at least to botanical, agricultural, forestry or horticultural institutions with libraries. Newspapers, gardening or non-scientific magazines and similar publications which are not designed to last do not count as publications in this case. Publication on the World Wide Web or on CD-ROM does not count as publication since the pages are not permanent. Publications must be dated. A new name appearing in a nursery catalogue will not be treated as having been published if that catalogue is not dated at least to the year. When you publish a new cultivar name, you must include a description of the cultivar. The longer and more complete the description the better, but at least state its obvious characteristics and if you can, state how it differs from an existing cultivar. It is helpful, but not compulsory, to provide an informative illustration of the new cultivar in the publication if expense permits. Make a statement such as "new cultivar name" (not just "new" or "new cultivar") after the proposed name so that others may recognize the fact that you have deliberately published a new name for the first time. If you regularly publish new cultivar names, it would be most advantageous to list any new names appearing in your publication in a single place in that publication.

The International Brugmansia & Datura Society is the ICRA for Brugmansia & Datura. To register and establish your cultivar name through them, you will find their registration form here.