I have a few photographs, (may be most people have too,) of a few plants/fungi and animals/insects I couldn't identify, even after consulting resources like Wikipedia. What is the best way to get a species identification from a photograph.
For general wild plants and animals (and fungi and everything else) there's a computer vision tool from iNaturalist, which can be used independently [1], or when submitting an observation to the site -- by web browser or in the app. I usually start with that, then look at other observations on iNaturalist and Wikipedia pages for the species.
If the photos are of ornamental plants, I think PlantNet's [2] model is trained on them.
(I work at GBIF[3], where suitable data from iNaturalist[3b] and soon PlantNet is sent, and can then be freely downloaded and used in research etc.)
[1] https://www.inaturalist.org/computer_vision_demo
[3b] https://www.gbif.org/dataset/50c9509d-22c7-4a22-a47d-8c48425...
Here's a big list: https://www.reddit.com/r/Whatisthis/wiki/links