Copiapoa humilis var. longispina (F.Ritter) A.E.Hoffm. Cact. Fl. Silvestre Chile: 118. 1989.

Nomenclatural References

• person : Adriana Hoffmann (b.1940) Based on occurrence of standard abbreviation 'A.E.Hoffm.' in the authors string.
• person : Friedrich Ritter (1898-1989) Based on occurrence of standard abbreviation 'F.Ritter' in the authors string.
• database : The Plant List version 1.0, record: kew-2735993
• database : The Plant List version 1.1, record: kew-2735993