Epithelantha greggii subsp. polycephala (Backeb.) D.Donati & Zanov. in Piante Grasse 30: 185. 2010.

Nomenclatural References

• person : Carlo Zanovello (b.1947) Based on occurrence of standard abbreviation 'Zanov.' in the authors string.
• person : Curt Backeberg (1894-1966) Based on occurrence of standard abbreviation 'Backeb.' in the authors string.
• person : Davide Donati (b.1975) Based on occurrence of standard abbreviation 'D.Donati' in the authors string.