Taxon - Links and literature
Kew Science - Plants of the World online 2024-05 [298321-2]
Kew Science - Plants of the World online [https://powo.science.kew.org], Facilitated by the Royal Botanic Gardens, Kew [as Oonopsis (Nutt.) Greene]
Data retrieved on: 1 February 2025
The Interim Register of Marine and Nonmarine Genera [1322327]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [as Oonopsis (T. Nuttall) E.L. Greene, 1896]
Data retrieved on: 5 January 2020
C. Ulloa et al. (2017): An integrated assessment of the vascular plant species of the Americas, Science. 358. 1614-1617 [as Oonopsis Greene]Data retrieved on: 19 September 2019