Opuntia megarrhiza subsp. pachyrrhiza (H.M.Hern., Gómez-Hin. & Bárcenas) U.Guzmán & Mandujano in Cactaceae Syst. Init
Opuntia megarrhiza subsp. pachyrrhiza in Cactaceae Syst. Init. 16: 18. 2003
is new combination for Opuntia pachyrrhiza in Novon 11(3): 309–314, f. 1–3. 2001