Fungus,mould or neither?

[Susie11]

I was doing some repotting today and I noticed that on my paph maudiae there was some strange growth growing quite happily in the medium bark medium. Humph, I had quite a scare when I spotted it because at first I thought that it was fungus but now that I think about it I think that it could be a dandelion clock seed that actually managed to germinate in my medium! - the cheek!! Does anyone know what might have caused this to happen? I have obviously repotted my paph and poured h/p on it just to be safe.