Found by @graysquirrel on decomposing conifer wood.

The sporocarps are about 0.4mm in diameter.

Found by @greysquirrel in Chaparral area

Found by my friend @debk

Found by @EthanSaso. His observation is at https://www.inaturalist.org/observations/151887228

Found in leafletters in a wet carrs. Accepted officially in Denmark as found no. 4 or 5.

Found by my friend @graysquirrel. Maximum size is only about 1/2mm in diameter for each fruiting body.

bioluminescent mushrooms (mycena lucentipes) taken during a photo trip to Costa Rica in 2020 - taken by Thomas Fuhrmann, SnowmanStudios - see more pictures on www.snowmanstudios.de

On dead alder (I think) in a snowmelt area. Yuba pass, 2045MASL

Found by @graysquirrel in a garden in Sacramento, on redwood needles. Focus stack of 178 images using a 10x microscope objective adapted to a Sony a7r2 camera.

2nd photo show reaction to 365nm UV light.

Garter snake and a fan

Growing on a weevil, on the underside of a leaf.

Growing on a pile of wood chips.

grown on an oak twig brought home from the forest (in a greenhouse)

On bryophytes on large log

growing in duff under spruce, less than 2 cm tall

Photos 2 and 3 were taken in the morning when it was close to 0C; the first photo was taken in the evening when it was around 12C
Captured in 2018

From the herbarium of Dr. Steven Stephenson, University of Arkansas. Collected by dela Cruz and Stephenson. On twigs, lowland dipterocarp forest.

Took some dry Doug-fir bark home and added water. Voila'. Very small, only 1.5 mm

Collected by Dr. Steven Stephenson, University of Arkansas

Thanks to @nschwab for the suggested ID

On Quercus agrifolia

Growing inside rotting wood. Pic 2 is after one day, Pic 3 is after two days.

Found on decomposing wood in a mixed redwood/hardwood forest. Second photo shows the cluster with the tip of a pencil for scale.