Agaricus fragilis Linnaeus, Species Plantarum 2: 1175. 1753, nom. illeg.

"Habitat ad ambulacra." RCN: 8431.

Type not designated.

Original material: [icon] in Vaillant, Bot. Paris.: 60, t. 11, f. 16, 17, 18. 1727.

Current name: Bolbitius tibitans (Bull.: Fr.) Fr. ( Bolbitiaceae).

Note: Index Fungorum observes that this is a homonym of A. fragilis Batsch: Fr. 1789, nec Pers.: Fr. 1801, and therefore illegitimate.