I've found PictureThis to be great for identifying plants. They claim to cover 100+ countries. There's a premium version but I just opt out by hitting the Cance

I've found PictureThis to be great for identifying plants. They claim to cover 100+ countries. There's a premium version but I just opt out by hitting the Cancel button at top right of the screen. It's been able to ID plants from photos other people have taken (pointing at their phone).