If your culture has a dark underside and thick, powdery aerial growth, it might be Hymenoscyphus
If your culture has tall, clumpy nodes of aerial growth (possibly with the tips of the nodes being beige), it is possible you have a culture of Irpex
If your culture is evenly dense, with a consistency similar to cotton candy, it might be Trichoderma
If your culture starts out white, but then turns to mottled reddish brown or beige, and discolors the media, perhaps it is Pezicula
If your culture displays aerial growth that resembles animal hair, it might be a species of Lachnum