Two identification units in Inocybe are keyed out separately, to cover significant variation in the shape of the spores.

• Inocybe (nodulose spores) includes species with nodulose spores, such as I. imbricata and I. scissa.

• Inocybe (rounded spores) includes those species with smooth (non-nodulose) spores, such as I. australiensis and I. violaceocaulis.

Inocybe (Fr.) Fr., Monogr. Hymenomyc. Suec. 2: 346 (1863).

Astrosporina J. Schröt. [species previously assigned to this genus have nodulose spores], Auritella Matheny & Bougher [smooth spores].