Yesterday morning I came across this yellow slime mould on the end of a log. It was near some old Ganoderma applanatum fungus, but that might have just been coincidental. Most of the slime mould's sporangia had burst to release the fluffy yellow spore mass, leaving a honey-comb of empty sporangia shells:
Under the microscope the spores look like this (x600):
And the spore mass contains these twisted capillitium filaments with pointed ends (also x600):
Taken together these indicate that the species is Trichia varia.
Photos taken in the Wilderness, Whiteknights Park, Reading University grounds, Reading, UK, on 2012-04-04.