Basionym: Lycoperdon fragile Vittad., Mem. Accad. Torino 5: 36 (1842) [MB#227530] Obligate synonyms: - Calvatia cyathiformis subsp. fragilis (Vittad.) Dring (1964) [MB#349113] - Calvatia cyathiformis f. fragilis (Vittad.) A.H. Sm., Lloydia 27: 150 (1964) [MB#349114] - Utraria fragilis (Vittad.) Quél., Comptes Rendus de l´Association Française pour l´Avancement des Sciences 14 (2): 451 (1886) [MB#507512] Taxonomic synonyms: - Bovista amethystina Cooke & Massee, Grevillea 16 (79): 69 (1888) [MB#205261] - Bovista cinerea Ellis, Bull. Washburn Lab. Nat. Hist.: 40 (1885) [MB#215224] - Bovista dealbata Berk. ex Massee, Journal of Botany, British and Foreign 26: 131 (1888) [MB#514664]