[niemandhier]

Cool, I did not know that this is so disputed a quasi factoid. Thanks for cleaning my brain!

Germany has “Baumkataster” which are databases for public trees in cities, they save all kind of tree metadata but gender is missing …

https://hub.arcgis.com/search?tags=baumkataster

[simiones]

I do think you mean sex, not gender - trees don't really have a gender or gender expression. Either way, it would be rather irrelevant, as most trees planted in cities have both male and female flowers (oak, birch, most conifers), or even hermaphroditic flowers (citrus).

[IAmBroom]

Great, now I have to hate trees for being gender-fluid, too?

I just spent $500 on gay conversion therapy for my dog! /s

[marcosdumay]

It's not really disputed. It's something that happened in one small place or two that people insist on repeating on the internet as if it's some universal thing.