Identified with the help of Seek by INaturalist
What I’ve learned so far.
Botanical name: Coprinopsis atramentaria
Ecological role: Saprobic, which means they grow on dead or decaying wood and speed up decomposition, which helps recycle nutrients back to the soil food web.
References:
Bryce Kendrick. (n.d.). Saprobic fungi. Eniscuola. Retrieved October 21, 2021, from http://www.eniscuola.net/en/argomento/fungi/fungi-knowledge/saprobic-fungi/.
Further reading:
I took the photos at different stages of growth.