I sourced this fungi from plant tissue from a hosta plant outside in my backyard.
THe fungi is fluffy white on top slightly yellow tinged and pure yellow on the bottom, it was one of the first fungi to show up, it has grown over top of other fungi, but other fungi grow underneath it.
I believe it may be Fusarium solani because of the pure yellow bottom and fluffy white top, however fusarium solani looks much more lighter yellow mine is slightly orange tinged, maybe this could be from neighbouring fungi?