This fungus grew from a swab of rotten squash. It covered the plate in 2 days, and brownish/black sporangiophores lined the lid soon after. Aside from the dotted brown-black sporangiophores, there is no distinct colour on the mycelia. There are no specific growth patterns or markings, and its colourlessness makes it the same colour as the petri dish. This is Rhizopus stolonifer, as I suspect the sclerotia of Sclerotium cepivorum would be larger.