Cereus gracilis var. simpsonii (Small ex Britton & Rose) L.D.Benson in Cact. Succ. J. (Los Angeles) 41: 126. 1969.

Nomenclatural References

• person : John Kunkel Small (1869-1938) Based on occurrence of standard abbreviation 'Small' in the authors string.
• person : Joseph Nelson Rose (1862-1928) Based on occurrence of standard abbreviation 'Rose' in the authors string.
• person : Lyman David Benson (1909-1993) Based on occurrence of standard abbreviation 'L.D.Benson' in the authors string.
• person : Nathaniel Lord Britton (1859-1934) Based on occurrence of standard abbreviation 'Britton' in the authors string.
• database : The Plant List version 1.0, record: kew-2711902
• database : The Plant List version 1.1, record: kew-2711902