Help with the identification of this plant

[Onion]

A friend of mine send me these pictures. "Plants" stand under a roof of a house, dry, shady. Soil is sandy and acid.

[Maggi Young]

I think this is the fungus Phycomyces nitens
It usually grows on animal dung or oily or greasy residue

http://www.bioimages.org.uk/html/r154341.htm

[Lesley Cox]

Something similar has come up in some potted plants of Rh. camtschaticum album recently, fine black hairs with a slightly brownish speck on their tips. I tipped the plants out and found some lumps of cat poo which I'd missed when potting. Love our new dog but he's useless with cats.

[Anthony Darby]

My goodness. 

[Onion]

Thanks for the identification, what a nice forum 

[Lesley Cox]

Nice Forum, nasty fungus.

[Hoy]

Nice Forum, nasty fungus.

What or who should break down the nasty dead leaves or other residue without the ubiquitous fungi

[Lesley Cox]

Oh yes, I'm all for fungi generally - think of Olga's and Cliff's fantastic pictures, among others'  - it's just THIS fungus. But I suppose it's breaking down too so really it's not the nasty fungus just the nasty cat (in my case) who supplied the material for the fungus to act on.