Cuphophyllus pratensis (also known as grass wax umbrella) is a type of umbrella mushroom belonging to the mushroom family. In North America, it is also known as grass wax umbrella, salmon wax umbrella, or butter grass umbrella. Its fruiting body is as tall as 15 centimeters, and the cap initially appears convex, then flattened, with a slightly concave center and a diameter of up to 12.5 centimeters. The surface of the cap is smooth and dry, ranging from light salmon to orange brown. The gills are waxy, light in color, widely attached to the stem and extending downwards. The stem is smooth, cylindrical or gradually thinner towards the base, with a milky color. Spore print is white, the spores are smooth, non starchy, and elliptical in shape.