Spores: 9.9-11.3 um, pink in mass, bright yellow by TL, minutely spinulose. On wood near melting snow.
Unfortunately forgot the batteries for my camera on this trip
First two photos are at mature stage. The remaining photos go backwards to immature stages.
Brown immature plasmodium and forming fruiting bodies is unusual; usual this species is white or yellow when immature.
Thanks to @malacothrix for finding these.