Opuntia engelmannii var. flexospina (Griffiths) B.D.Parfitt & Pinkava in Madroño 35: 348. 1989.

Nomenclatural References

• person : Bruce Dale Parfitt (1952-2009) Based on occurrence of standard abbreviation 'B.D.Parfitt' in the authors string.
• person : David Griffiths (1867-1935) Based on occurrence of standard abbreviation 'Griffiths' in the authors string.
• person : Donald John Pinkava (1933-2017) Based on occurrence of standard abbreviation 'Pinkava' in the authors string.
• database : The Plant List version 1.0, record: kew-2391985
• database : The Plant List version 1.1, record: kew-2391985