Literature
- Kunkel G. 1957.
Ueber einige endemische Kompositen der Flora fernandeziana. Ber. Schweiz. Bot. Ges. 67: 428 457. - Skottsberg C. 1922.
The phanerogams of the Juan Fernandez Islands. The natural history of Juan Fernandez and Easter Island 2: 95-240, 11 lám.