Conservation Status: Not of concern
Callistosporium luteo-olivaceum is a distinctively colored, smallish mushroom that grows on well rotted, often mossy, wood any time from spring through fall. It prefers conifer logs and stumps, often is associated with the bark, and fruits singly, as scattered individuals, or in small clusters. Typically the caps are yellow-brown to liver brown, with thin, close, yellow to ocher or olive-tinted gills, and hollow, fibrillose stipe that is similar in color to the cap and has yellowish tomentum at the base. The taste is farinaceous-bitter and the flesh turns violet when dabbed with 3% potassium hydroxide. The spores are colorless with yellow contents when mounted in ammonia.