View the spoiler for my guess at what I think it might be, but please first come to your own conclusion before looking at mine โ I don't want to bias your guess.
My guess
Psilocybe cyanescens
They were found in mid-november in the Salish Coast region of Cascadia. They were growing out of woodchips composed of a mixture of western hemlock (majority), and western red cedar.
Side view of one full mature specimen:
![](https://sh.itjust.works/pictrs/image/f1e5cda8-d5b3-46e0-91a9-7930ff3cb74c.jpeg)
A group with a sample of the substrate (the cap appears to be umbonate):
![](https://sh.itjust.works/pictrs/image/fce9489b-3e82-4d9c-a475-7de082ab23d3.jpeg)
A closeup side view, and internal view of the stem (it appears to be hollow):
![](https://sh.itjust.works/pictrs/image/90c4ac0a-ec6c-4a1a-9daf-92e3422698c9.jpeg)
![](https://sh.itjust.works/pictrs/image/ff84ae5a-2b5f-4b49-89b7-d74e74eebe21.jpeg)
Cross section of the gills โ they appear to be adnate, or sub-decurrent:
![](https://sh.itjust.works/pictrs/image/15dc9d18-0807-46b0-a2d4-7ef689626e39.jpeg)
Underside of view of the gills:
![](https://sh.itjust.works/pictrs/image/dbc26cb4-8683-4138-93b6-d65d483c4abf.jpeg)
Spore print (first on white background (the split is due to two halves), second on a black background):
![](https://sh.itjust.works/pictrs/image/9463ebb5-6e19-4b11-9ebd-22c75cc103f6.jpeg)
![](https://sh.itjust.works/pictrs/image/693b25c4-dee2-4992-bdcb-03ac46294f94.jpeg)
Examples specimens once dried:
![](https://sh.itjust.works/pictrs/image/befb0682-4b0a-469b-b918-5fe153e21f34.jpeg)
![](https://sh.itjust.works/pictrs/image/deb77abf-1b92-4e7b-b657-bb104446bc96.jpeg)
Examples of the colony, and the location/substrate in which it was growing:
![](https://sh.itjust.works/pictrs/image/8718c605-5825-46fc-b23b-862a5262283f.jpeg)
![](https://sh.itjust.works/pictrs/image/de8ad1aa-77e2-4e4a-8bc7-3c4b7e18db2f.jpeg)
Cross-posts:
Interestingly specific comment ๐
They have a stiff chalky texture that's easy to recognize if you know it but throwing them at a tree to see if they shatter like a snowball is a great way for beginners to confirm that they've found a Russula.
That's such a unique and interesting method of identifying a mushroom!