Uniformly red cap with off-white gills and stalk; its flesh and stalk are brittle. It grows singly or in groups, on moss and in mixed woods. July–October. Cap cushion-shaped, becoming convex, then becoming vase-shaped; with incurved margin; uniformly red; texture sticky, smooth; flesh is white and brittle. Gills broad; spacing close; white, becoming off-white; attached. Stalk: straight, enlarging a bit at the base; off-white; texture wrinkled; brittle. Spore print white. Spores magnified are elliptical to oval, ornamented.
Lookalikes: There are many, many russulas and many red russulas. It is often difficult to tell one from another. You can identify mushrooms in the genus Russula by their blocky shape and their brittleness. They will break apart in your hand like a piece of chalk. The stalk even looks like a piece of chalk.