Ma Bo, commonly known as cow dung mushroom, horseshoe bag, medicine steamed stuffed bun and ass bubble; Basidiomycetes Marbodaceae. When tender, it is white, spherical like a mushroom, big, delicious and tender like tofu. The old man is grayish brown, soft, slightly tough in appearance, with small holes at the top, dust flying out of the shell, and spongy and yellowish brown inside.

Malabo original factory production, Fuzhu Chuang used very well. "Obviously, there is no doubt that Tao describes the purple Mahler Calvatialilacina. Since then, all previous dynasties' materia medica, such as Thousand Daughters, Newly Revised Materia Medica and Shu Materia Medica, have listed puffball strips, and their characteristics are described as "purple floc" and "purple dust coming out", which accurately describes the characteristics of purple puffball. In the Song Dynasty, the variety of puffball changed. According to "The Romance of Materia Medica", Ma Bo is "as big as a head, as small as a rise", and Ma Bo is cow dung. "Compendium of Materia Medica" also uses cow dung as a synonym for puffball, but according to the records in "The Romance of Materia Medica", cow dung was another variety of puffball that was used as medicine at that time. Judging from the attached drawings in Compendium of Materia Medica and the textual research on plant names and facts, it seems that the former refers to Trichocarpa pubescens or Trichocarpa pubescens, while the latter is a copy of the former.

The medicinal materials of puffball collected in China Pharmacopoeia (2000 edition) are Urticaceae fungi, which come from puffball, puffball and purple puffball.