The cap of Rhodophana nitellina is orange to reddish and hygrophanous. It can be convex, flat, or depressed, and is about 2-6 centimeters in diameter. The gills start out creamy in color and darken as the mushroom matures. They can be adnexed or notched. The stipe is the same color as the cap and is about 2-5 centimeters long and 2-5 millimeters wide. The spore print is pinkish tan. This mushroom smells farinaceous or cucumber-like.