Can you guess based on these descriptions? We don't know conditions it is growing in. Aspergillus — some forms of aspergillus will appear yellow in color. This is a very common household mold that can be found anywhere there has been any kind of water damage. Serpula lacrymans — This may be discovered as yellow fungus on wood. It is often called house eating mold because it feeds on wooden structures and quite literally eats away at the house. Mucor — This mold strain is initially yellow or white in color but eventually turns to gray. This is one of the fastest growing strains of mold and has very dangerous side effects when exposure occurs. This mold strain can cause a life-threatening infection called Mucormycosis where the mold invades the blood vessels in the body, causing the blood supply to be compromised. Epicoccum Nigrum — This strain of mold ranges in color from yellow to orange to a light brown color. This is another very rapidly growing strain of mold that can be found on a myriad of different household surfaces including; mattresses, carpets, wood, drywall and painted furniture. Geomyces Pannorum — this strain of yellow mold is unique in that it thrives in cooler environments whereas most other mold strains prefer warmer climates. This type of mold is common in the northern hemisphere, but not so much in the south. It is a yellow-brown color and can be found on many different damp materials including; walls, floors, wood and paper.
