The Lion’s Mane is a member of the unusual teethed fungi, which form tooth-like structures instead of gills. The mature mushrooms look like pink tinted-white pom-poms. This is an aggressive species that spontaneously forms primordia on malt agar and sawdust substrates but may be slow to colonize grain spawn. The mushroom develops quickly once initiated and can form from tiny primordia to a large, ready to harvest mushroom in one week or less.