[pluteoid]

Correctly identifying any given mushroom can be hard, requiring the right taxonomic keys (and the comprehensive ones come in multiple volumes), a microscope, various stains and reagents, and lots of training. Field mycologists have a term, LBM, meaning "little brown mushroom", which speaks to the pain of separating such specimens to species level even with lots of ID experience.

On the other hand there are many edible species which are unmistakeable and which you can quickly learn to reliably identify based on obvious features. In many European countries, foraging for wild mushrooms is a traditional pastime and intimately linked with national cuisine.