Thomas Kuyper (A Revision of the Genus Inocybe in Europe. I. Subgenus Insperma and the Smooth-Spored Species of Subgenus Inocybe. Rijksherbarium: Leiden, Netherlands. 247 p. 1986.) considers I. pyriodora a nomen dubium:
Type not found in herb. Persoon (L). The original description by Persoon (Syn. meth.Fung.: 300. 1801) seems to suggest I. bongardii (Weinm.) Quél. on account of pileal covering and colour of the lamellae. The name, however, has generally been applied for a species of subg. Inocybe with broad, somewhat amygdaliform spores with an apical papilla and fusiform pleurocystidia, described here as I. fraudans (Britz.) Sacco (see p. 78). As the name has been widely and persistently used for a taxon not including its type, the name I. pyriodora may be rejected under Art. 69.1.
To make matters more complex it might be added that there is one collection in the herbarium Persoon (L 910.255.185) labeled Agaricus pyriodorus and that this collection represents I. sindonia (Fr.) P. Karst. (see p. 340)!"