Uh, so I found this growing in my yard | The Woodsman Hut | Forums

Found it growing under these boards in the mulch we laid last year

is it this?

Psilocybe cyanescens is a potent hallucinogen that grows abundantly in flowerbeds mulched with bark mulch, wood shavings or sawdust. Unless the reaction is one of extreme fear, medical treatment is advised only for children. Reassurance is considered the #1 treatment for adults. Any fever should be treated with cooling blankets or sponges and not with aspirin or other salicylates. At least one very young child has died from consumption of what was reported to be Psilocybe baeocystis, but what I suspect was actually this species, Psilocybe cyanescens. The other hazard is someone mistaking a deadly Galerina or a deadly Conocybe for a Psilocybe. One teen-age girl from Washington State died from mistaking Galerina autumnalis for the highly similar Psilocybe cyanescens, Psilocybe stuntzii or the next species, Psilocybe baeocystis.

http://academic.ever.....hm/s24.htm

I think it is

https://mycotopia.net/topic/63569-5-year-old-psilocybe-cyanescens-bed-east-us/