Grusonia versicolor (Engelm. ex Toumey) G.D.Rowley in Tephrocactus Study Group 12(3): 45. 2006.

Nomenclatural References

• person : George Engelmann (1809-1884) Based on occurrence of standard abbreviation 'Engelm.' in the authors string.
• person : Gordon Douglas Rowley (1921-2019) Based on occurrence of standard abbreviation 'G.D.Rowley' in the authors string.
• person : James William Toumey (1865-1932) Based on occurrence of standard abbreviation 'Toumey' in the authors string.
• database : The Plant List version 1.0, record: kew-2607309
• database : The Plant List version 1.1, record: kew-2607309