Mab, commonly known as cow shit mushrooms, horseshoe buns, medicine buns, horse butt bubbles; tambourine fungus family Mabaceae. When young, white color, round ball like mushrooms, larger, fresh and edible, tender as tofu. Older is gray-brown and weak soft, external slightly tough skin, the top appears small holes, popping the dust flying out, the interior is like a sponge, yellow-brown.

Damabu original plant out, Fu Zhu sores with very good also." Apparently Tao described purple malleus Calvatialilacina undoubtedly. Subsequent generations of materia medica, such as "Thousand Golden Wings Fang", "Newly Revised Materia Medica" and "Shu Materia Medica" are listed in the article of the horse Bo, its traits described as "such as purple flotsam", "Purple Dust", etc., very accurately depicts the traits of the purple horse Bo characteristics. To the Song Dynasty, the varieties of Ma Bo have changed. Materia Medica Evolution" records, the horse Bo "so-called cow's ulcer horse Bo, there are as big as the head of the person, the small is also like a liter" cow's ulcer that is the cow's feces mushroom. The Compendium of Materia Medica is also a synonym of Mabo with Cow Poop Mushroom, but from the record of "Evolution of Materia Medica", Cow Urinating is another variety of Mabo for medicinal use at that time. From the accompanying illustrations in the Compendium of Materia Medica and the Botanical Nomenclature, the former seems to refer to the large or decorticated Mabo, and the latter to be a copy of the former.

The Chinese Pharmacopoeia 2000 edition*** contains the herbs of Mabo, all of which are fungi of the family Gray Bun family, and have three sources: decorticated Mabo, large Mabo, and purple Mabo.