Oh thanks for the pointer! I was not aware of https://mapcomplete.org/trees

Thanks for your interest. Source is at https://github.com/mdornseif/osm-treewarden a prototype is at https://mdornseif.github.io/osm-treewarden/.

There is not documentation and it is aimed so far at old growth orchards in East-Belgium , Luxembourg and Germany.

It aims at displaying only what is of interest to arborists and suggest them sensible tag values.

For example consumers love leaf_type - but for the botanical inclined this can be deducted reliably from genus and species.

The most interesting stuff for me resolves around taxon, taxon:cultivar and cultivar. I’m very interested in using wikidata IDs to allow disambiguating.

I dream also of building something like street complete for the botanically inclined.

Hope this gives some idea.