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under peeling hardwood log (bigleaf maple?) along creekbank, mulchy wood partially submerged in running water

Brought to ID table with La Crosse public library walk.

Located on a fallen tree/log.

Reoccuring species on the same Populus log.
Microscopy was done last year https://inaturalist.ca/observations/182071448

Small, yellow, minutely stipitate cups on madrone scale bark. UV+ bright blue

Guess based on underwater habitat. Third and fourth shots are underwater in-situ.
Unusually long thin spores.
~45-50 X 1.7-2 µm.
Asci ~200-240 X 7-8 µm.

Everything I found.

Normal ones everywhere in June 2017. The big one here is only a couple of cm tall. Hardwood stump. Mixed hardwoods. Maple, birch, ash, oak. Microscopy - spores approx 11.5-13.4 x 4.5-5.2.. Vouchered.

Collected for the 2023 North American Mycological Association Annual Foray.

In wet serpentine meadow

Under fir

ex Taxus baccata

On underside of decorticated conifer wood (Tsuga or Abies) in melting snow. Sporocarps: 1-2 mm tall. Spores: 8-10 um, pale to mod. dark brown, minutely warted.

Found on this log, in a sea of yellow fairy cups: https://www.inaturalist.org/observations/188471703

See updates here: https://www.inaturalist.org/observations/187206711

https://www.inaturalist.org/observations/187207450

Large fruiting beneath rotting log in heavy shade

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Originally posted to Mushroom Observer on Oct. 24, 2014.

Growing on well decayed wood

I'm assuming the blackish spheres are a different stage of the same species, if it's something different I can split the observation.

Small black cups growing gregariously on soil and living wood/tree roots, scenes like this punctuated the trailside throughout this locality, maybe 2-3 per mile

maybe Bertia moriformis or similar

I think. @rambryum. Seems to be among Riccardia. On wood. Marble River Provincial Park, BC, Canada