I read the article and its linked sources in a few cases. How else would I have been able to directly address them?
When Australian scientists tested the accuracy of popular mushroom ID apps last year after a spike in poisonings, they found the most precise one correctly identified dangerous mushrooms 44 percent of the time.
None of which use LLMs and predate the issue that the article is talking about. I checked, before my comment, all of their pages on the iOS App store, at least. They're all 4+ years old and none use LLMs.
Amusingly enough, the Public Citizen article linked earlier in OP's article calls out iNaturalist as something they've been working with to positively improve the experience of identifying mushrooms:
The Fungal Diversity Survey, a project devoted to correcting the many gaps in understanding regarding fungal biodiversity, partners with iNaturalist to document and verify mushroom observation
But ultimately there were no apps ACTUALLY TESTED that use OpenAI or LLMs for their identification.