Skip to main content

White Cheese Polypore

We haven't had rain since early September. So finding new mushrooms for the blog hasn't been easy. But I did find these dried out White Cheese Polypores, Tyromyces chioneus. These can grow up to 10 cm wide. They are stemless and have irregular, azonate caps. The upper surface is often velvety. The pores are angular to circular, 3-5 per mm. It is saprotrophic on dead hardwood and is easily removed from the substrate. When fresh, it's fragrant and soggy and you can squeeze water out of it. It dries corky. Negative reaction in KOH. Tyromyces means "cheesy," and chioneus means "snow white." Compare with Sprague's Polypore.