Leucoagaricus leucothites, commonly known as the smooth parasol, woman on motorcycle,[2] ma'am on motorcycle,[3] white dapperling, or white agaricus mushroom, is a species of agaric fungus.

[5] While sometimes regarded as edible,[6] the species is suspected of being poisonous due to gastric-upset-causing toxins.

[6] The mushroom's cap is 4 to 15 cm wide,[6] is granular, white or gray-brown in color then sometimes grayish or pinkish.

[4] The stipe is 5 to 12 cm long, commonly with a wide base, and bruising yellow or brown.

[6] It generally appears in civilized areas such as gardens and parks, but sometimes is found in forests.