Opuntia tidballii J.M.Bigelow in Pacif. Railr. Rep. Parke, Bot. 4(5): 11. 1857 Opuntia tidballii J.M.Bigelow in Pacif. Railr. Rep. Parke, Bot. 4(5): 11. 1857is correct spelling for Opuntia tidbaldi J.M.Bigelow in Pacif. Railr. Rep. 4: 11. 1856Taxon for this nameOpuntia tidballii J.M.Bigelow