Current name: Calocybe obscurissima (A. Pearson) M.M. Moser, Kleine Kryptogamenflora von Mitteleuropa - Die Blätter- und Baupilze (Agaricales und Gastromycetes) IIb/2: 101 (1967) [MB#327258]
Basionym: Tricholoma ionides var. obscurissima A. Pearson, Transactions of the British Mycological Society 29 (4): 192 (1946) [MB#346462] Obligate synonyms: - Rugosomyces obscurissimus (A. Pearson) Bon, Documents Mycologiques 21 (82): 66 (1991) [MB#354382] - Tricholoma obscurissimum (A. Pearson) Hora, Transactions of the British Mycological Society 43 (2): 459 (1960) [MB#340328] - Lyophyllum obscurissimum (A. Pearson) Cons. & Contu, Rivista di Micologia 45 (2): 144 (2002) [MB#373862] - Calocybe ionides var. obscurissima (A. Pearson) Krieglst., Die Großpilze Baden-Württembergs 3: 145 (2001) [MB#529521]
